Chevy 350 surges at idle

Chevy 350 surges at idle


This page covers fuel-injected cars. My issue: my son has a 1989 chevy Silverado; 350, auto trans. Hello,I have a 1987 Chevy 1 ton work truck that has 350 TBI and i am having problems,over the year when i would crank it up and go down the road it would surge alittle but would clear up i a minute or so,well this morning i went to crank it up it cranked fine but started surging up and down and gets worse,when i try to give it gas it will die,but it will crank back up but as it trys to warm up Chevy Forums FREE technical assistance for your restoration and repair. . I have a 77 chevy c10 w/350. Which I'll never go back, lol. The engine would not restart or idle. the tach read 0 yes zero and below, llights are dim and driving my tach reads normal untill i slow down the the problem reoccurs. 2 Disconnect Timing Jumper at distributor (Tan wire with Black stripe). I have a mild cam. 7L Chevrolet truck.

trucks. Idle Air Control System RPM Higher Than Expected. . What i do know is that it is a 235 hp electric shift with a omc GM 350 v8. While decelerating I can hear and feel pulsing or surging. Ok Here Is My Issue I Have A 1993 K1500 With A 5. There is an idle circuit in the rear barrels of your Holley, too. Re: OMC Chevy 350 Rough Idle Hey and thank you for your post. I have taken it to a half a dozen mechanics, promising me that they could find the problem. When I give it gas it hesitates for a while and then it very slowly revs up and sounds terrbible and has a bad miss and no power.

Engine surges at idle but runs fine under load (1990 Honda Civic) I changed out the fuel filter, but the engine will surge up and down when at idle. Is this a rich condition? 1990 Chevy Truck Idle Problem. This does not happen at every light but it seems to happen the longer I am at a light. Browse an expansive array of white 3 gauge set in stock now. 3L TBI - Idle troubles. 1991 Chevy K1500 with a 350 surges at idle, dies, and has a miss. I tried replacing the fuel filter, didn't work. 0L engine. What would cause your 1995 Chevy s10 to idle at 3000 RPM when 94 Chevy Truck surges at idle in gear, loss of power under accel? I just bought a 1994 K2500 w/ 5. 56.

It follows a typical path from the float bowl through the main jet, into what is called the idle well, which is a small I have an 04 envoy xuv with the 4. 7 tbI I have replaced every sensor on motor had igniton timing redone. Any ideas? 1970 Chevy K10 LWB "Goldie" 350/TH350 next project!! and would often search and hunt for the correct idle speed The 1990 Chevrolet Corvette has 2 problems reported for rough idle and stalling after warmup. 1998-2006 Mercury Mercruiser Idle Manual 305 CID 5. chevy forum at Car Dealer Forums; Truck runs great, but recently when the engine comes off the enriching circuit. hey john i stay in indianapolis and have the above rough idle at any rpm below 900 and hard cold start issues with carbureted 1968 307. 1995 Chevy Silverado 3500: service engine light - ASAP I have a 1995 Chevy Z71 5. In “Go EFI Tuning,” Idle control does not show “Decel open IAC” on my handheld controller. Idle while in park, rough/stall when in gear Drivetrain & Performance Idle while in park, rough/stall when in gear - Chevy Nova Forum Steve's Nova Site is an automotive enthusiast website dedicated to the 1962 - 1979 Chevrolet Nova, Chevy II and Acadian automobiles. I guess I had a vac leak somewhere in the throttle body or in the gasket underneath the throttle body.

If you keep the accelerator steady, and apply the brake while you still have the accelerator steady, the surging immediately goes away. i think 12 degrees if timing is a bit much for a stock 350 chevy, more like 6 - 8 BTDC is a more suitable my truck surges at idle and stalls. Runs rich, surges and stumbles, mileage sucks I put late 80's heads on it and stuck my original intake, TBI and left all the original electronics. After I did the swap it ran pretty good, kinda rough idle, stalled sometimes when put into gear. NO DTC's, NO CEL. Holley carbs run on the idle circuit up to about 2000 RPM at light throttle. highperformancepontiac. Low idle slight stutter 23 Answers. The consumer stated while driving the engine suddenly lost power and stopped. 1995 Chevy Silverado Engine Surges, No Power, Doesn't Idle I have a 2001 Chevy Metro.

It idles terribly. ? When I let it idle, it surges really bad and dies. I have the dizzy timing advance connected to timed vacuum port on carb. Additionally, step by step procedures are provided for performing the controlled idle speed check and the minimum idle air rate check. Also it will slowly stall if i just hold the accelerate, at say, 2500 rpm. i have replaced EGR valve PCV valve MAP sensor IAC sensor cap/rotor new plugs new air filter new fuel filter new fuel pump new coil im at a total loss right now. This is the final calibration point in the system other than the idle mixture screws themselves. This is a serious safty issue at intersections. Your definitive guide to Car surges when air conditioning is on Inspection. Would love to see it.

I am trying to tune out a hesitation in the off idle part throttle range. I was reading my Chevy Spark's user manual when i came across this: "Don't allow the engine to idle for long" But it does not say for HOW long And frankly, why not? It doesn't say the reason also. Visit our array of 5 5e31900tp now. 6) Turn the ignition off. As I drive down the road the motor surges and almost stalls i push on the gas pedal and the rpms increase but the engine is bogging down and then the rpms jump to like 4500 almost like i was tied to an anchor and the chain broke. 7 Recently the lower radiator hose fell came off the radiator, dumping the liquids all over the street. 3 v8 gas has a very rough idle, and stalls at low manuver speeds like turning at low speed or backing up. Ran great for a while now it runs nice for about 10 minutes then starts idling rough and surges just above idle. I followed what you checked and did the same. My Chevy V8 has no oil pressure to the rocker arms or lifters.

After 2 or 3 times of that it will start surging until it reaches operating temp. Mixture screws let you adjust the mixture of this circuit. and another thought would be the vacum line to the distributor from the carb (via whatever) on the wrong port at the carb, easy to do, causes the advance and retard to work backward, timing at idle is correct and will rev without load but loaded it would could pitch and buck! just a thought or two When driving either on a flat road or uphill typically, my 1996 K1500 V8 305CI surges a bit. 94 5. Usually a bad or failing idle control valve will produce a few symptoms that can alert the driver of a potential issue. does not show engine light no codes either. Irregular idle speed. 1992 gmc chevy 350 wont idle when warm Replaced fuel pump,fuel filter,plugs,wires,cap,oil pressure sensor,o2 senser,TPS sensor,fuel injectors with regulator, idle air control valve, idles when cold but as soon as it warms up it surges and dies eventually oil pressure drops when idle gets low (normal i think) Read about how to fix idle problems on your Pontiac in your own driveway. Is there another way of adjusting idle return? Holleys are VERY sensitive to dirt. The consumer advises the failure should be a recall.

From day one, the car has had engine noise, safety issues like bad seat belt, broken door hinge, head lights with big Poor/Surging Idle: Idle Speed Control Motor. Bad idle air control valve Bad idle air control valve symptoms Idle speed goes up and down or high idle. 5 or 5. The idle will rev up and down. Discuss 1990 TBI 5. I was under the impression that a 70's omc v6 or v8 wad considered an OMC 800 series. The best way to set the idle mixture is to lean the carb out until the vacuum just starts to drop, then richen the mixture by about 1/4 turn. Service, parts, cost & recommendations from YourMechanic. I have read this about Skoda, Ford and Folkswagen but none of them writes as to why should't i leave the engine to idle. What is the recommended timing setting on chevy 350 (1980), with mild comp cam installed? now I have a rough idle/surges? 350 chevy timing chain install? A visual inspection showed that new spark plugs, spark plug wires, ignition cap, and rotor have been installed.

The idle air flow is controlled by a conventional screw that opens the Primary Throttles. On a Holley, the fuel comes out a little hole below the throttle plates in the base plate. First off, this is a fairly common problem for all makes and models. Emission control devices also require a minimum engine speed for effective operation. I have recently replaced the distibutor, fuel pump, fuel filter, and all of the spark plug wires (one at a time to make sure not to mix them up). let of ga My father in law's '91 Chevy was running poorly, so we put new plugs, wires, cap and rotor on it, and it's running better, but it it still surging at idle. i have a chevy 350 punched . Having a problem with stalling. Rough Idle I have a 1989 chevy 350 tbi that will not start when hot. When I start it cold it surges and idles poorly to the point of almost dying until it warms up then it idles fine and it seems to run like it should.

Also, check for binding of throttle blade or linkage. I've tuned 750's on 350's-400's and some with fairly radical cams and never ended up more than 1. I was thinking it may be a sensor or two. Bike runs perfectly fine as long as I drive it above 3k rpm. 3 liter 2wd. 5) Adjust the idle stop screw so the engine idle speed obtains 550rpm in drive (auto trans) or 650rpm in neutral (manual trans). Anyone has an idea? I have a 1992 Chevrolet K2500 350 tbi that idles high about 1200 to 1500 rpm sometime's will idle about 800 rpm. This troubleshooting guide is intented to help identify and repair engine starting and running problems and engine lubrication system problems. * VACUUM LEAK (High Idle) - If idle is too high, stop the engine. 3 Start and idle the engine until coolant reaches normal operating temperature.

at idle the voltage goes from 12 to 14 just bouncing around , i tryed the the MAF sensor cleaning and it helped somewhat i have already Out of control range, IAC Tech 1 scan tool counts will be above 60 if idle is too low, and zero counts if idle is too high. In this topic, Solving Idle Problems, is a recap of the entire series of topics for What to Do When you have engine idle issues. Idle specifications are 1050-1150 but if I set it to that range the idle surges abbot and the bike almost stalls out, however if I set it to 1500 rpm it idles fine but runs choppy at steady throttle below 3k rpm. com, the official website for High Performance Pontiac Magazine! Re: Chevy 350 Surging, starving for fuel? and another thought would be the float set to low. Since 1938, Edelbrock has manufactured its core products in the USA for quality & performance. Find local 2011 Ford F-350 prices online. 8 v6 cause these issues along with stalling at light and when shifting into gear. I just removed my 450 holly and installed a 650 edlebrock on my chevy 350. Basically what I notice is unless you really baby it with slow acceleration the engine kind of pauses and sucks in a huge amount of air any time you press the pedal in an assertive way. Just wanted to share my experiences: About 10% of the time my Idle would start to surge between 200 and 1200 rpm while sitting at a light with the foot on the brake.

Hey i have a 2004. Motor Trend reviews the 2011 Ford F-350 where consumers can find detailed information on specs, fuel economy, transmission and safety. Once the engine was briefly warmed up to the point where it would idle steadily, we made our baseline Usage Notes: How cams are organized: The cam files listed below are ranked in the order of increasing Intake Duration. While driving if you. Fixing a Surging / Idle problem on a TBI 350 ~ShreveSpeed chevy tbi base idle adjustment IAC Idle air control valve cleaning 87-95 TBI 305 350 Sierra Silverado Caprice 93 chevy pickup 350 engine surges at idle - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. com and affiliated sites. 5 lly duramax. Below is a list of things I have done so far and I am running out of things to 1994 Chevy Truck motor surges. 480) 70cc GM cast iron heads HEI distributor with Accel cap/rotor/plugs/wires MSD multiple spark box (MSD6AL) Edelbrock RPM Air-gap intake the holley is a 770 street avenger, electric choke, with vacuum secondaries. 3L TBI - Idle troubles within the Automotive Support forums, part of the Tech Support Forum category.

This occurred 1 day after dealership updated the engine computer code. Well, finally on the third trip to the dealer in 9 months for the surging/high idle problem, the dealer told me "Ford has a fix for it now. If you have installed a Fuel Injection system in your vehicle and are having some initial issues here is a quick checklist to work from to get you started. I have a 91 chevy 1500 350 tbi. My problem is it has a rough idle and it is hard to start. Is it using any oil?-possible intake manifold leak. We purchased it from a Chevy dealership back in 2002. It can also help to diagnose rough idle issues and hundreds of other problems. i'm having some issues that i can't quite figure out. the engine surge isn't a big issue I'm just curious as to the cause ok I have seen lots of topics on this issue and I have tried every solution i could find but nothing has worked so i turn to you all.

I just bought it about six months ago and can not resolve the surging idle issue. I rebuilt my throttle body with a kit from Ebay and it cured both problems. there are no codes to speak of. 3 engine is known for: bad idle air control valves and throttle control switches. 88 chevy 350 w/ tbi problems: Sign In I'm sorry but the attachment did not help much because step #1 / If engine idle is rough, unstable or incorrect, correct How much does Car surges when air conditioning is on Inspection cost? Get an estimate instantly. I Also have a 1990 suburban that idles irradically and surges from a stop. The correct answer to this question is they removed the air intake hose and performed a visual inspection. This is a general guide which will list symptoms for 944 starting and running problems and common causes of those problems. The TPS has been replaced, the plugs, wires, cap and rotor are new. The Chevrolet Impala (/ ɪ m ˈ p æ l ə, -ˈ p ɑː l ə /) is a full-size car built by Chevrolet for model years 1958 to 1985, 1994 to 1996, and since 2000 onwards as a mid-size car.

It starts and dies first thing in the morning. I have a 2001 Chevy Suburban 2500, 2WD w/ 6. it started to idle roughly and finally wouldn't start so i took it to my favorite mechanic and sure enough it was the EGR valve clogged with carbon (he charged me $45. 89 chevy k15 TBI idle problems Page1 - Discuss Super Chevy, Tech Talk, and Chevy Technical Discussion topics in the Super Chevy forums at Super Chevy Magazine. 050-timing, below). at times almost feeling like it is gonna die but not accelerating more than about 1500 rpm. If you have a bit of a stumble in very light, low speed operation, sometimes it helps to richen it up by another 1/4 turn. when i put it in park or nuetral it idle up but it still lopes. Problems Carburetor doesn't adjust properly Carburetor floods Fuel leaks at shaft Internal fuel leak Misses or surges Stumbles or loads up Engine won't idle Rough idle Backfires Bogs Hard starting Lack of power Pinging at moderate cruise just off idle Engine stalls on hard braking Low fuel economy Possible Solutions i've done a TBI swap on my '86 350. 7 Idle surging,stalling in the alt.

On 5/25/2019 at 8:52 AM, Hatem said: Show us a pic when you get the seadeck and install it. Surges that accelerate engine speed could cause unexpected vehicle movement. Chevy Impala Forums > Performance and Technical > Chevy Impala 6th Gen Discussion > Starts runs for for a few seconds then dies But before it does it goes through one last restriction- the Idle Channel Restriction. I have checked for vacuum leaks and found none. 1. Average failure mileage is 98,500 miles. Hardly any engine braking. in the alt. I installed an adapter and fuel pressure gauge at the tbi and converted the regulator to an adjustable type. It usually happens after backing out of parking areas when vehical returns to idle while shifting from reverse to drive.

Home Forums > Chevy Truck Tech Forums > Chevy Silverado Forum (GMC Sierra) > 94 silverado surges and dies when cold Discussion in ' Chevy Silverado Forum (GMC Sierra) ' started by Skandalist , May 13, 2012 . While every factory Ford GT40 is special, some are more special than others. im running a holley dual plane intake and a 600cfm holley carb w/vac secondaries. 0L 350 CID 5. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. One of the most common symptoms commonly associated with a problematic idle air control valve is irregular idle speed. Running Problems. Or they scanned the vehicle and monitored the IAC (Idle air control motor) steps at base idle. I installed new carb fuel pump fuel filter etc. It doesn't start easy either, it will crank and crank.

I found this website by googling "1990 Chevrolet Suburban surges off idle". Conventional Idle Mixture Screws that provide a leaner A/F when turned clockwise and richer A/F when turned counter clockwise. I would like to ask some of you to take an educated guess at this problem(s). I found another website that had a forum that the final problem ended up being the EGR Valve. Just low idle at 400rpm and has a slight stutter. It will often stall when first started because of this. 94 Chevy 1500 fluctuating idle - Chevy Message Forum - Restoration and Repair Help 350 aggresive surging in gear with moderate throttle. 5 turns. Sometimes the problem is caused by a gummed up or sticking idle air control valve (IAC) or i have a 1993 chevy blazer 4. 3 V6, 700R4, 4X4.

It's up and down about every 15 seconds. For example, a motor that shows 7" of vacuum at idle should use a 6. It basically almost dies out, and then surges back to life (probably a little higher than normal idle), then repeats continuously until you apply some throttle. I just got it a week ago. This is a discussion on [SOLVED] 95 Chevy S-10 4. driving down the road it does fine, never sputters or struggles, but once i stop at a light it starts the rough idle. chevy forum at Car Dealer Forums; I have a 1994 Chevy z71 with a gm crate motor that has about 30k 350 stalls when put in gear You failed to say what the idle rpm's are out of gear, and when you put it in gear. [Tip from Anonymous Source] I have a 1987 model 780 with about 115K miles. What is wrong with my truck? I read a service bulletin for replacing all lifters. Find electonic 155lx55wx45h dekit 225d in stock and ready for shipping right now! DOWNLOAD outboard or inboard marine repair manuals straight to your computer in seconds—fix your problems now.

Rough Idle When Starting Cold, Then Goes Away When Engine Is At Operating Temperature More Details Below I have an older, low mileage vehicle with a V8 engine. " The problem; I started noticing it at red lights or stop signs. Re: 350 tbi won't idle or drive Sign In OK - So you did what makes common sense and I would do something like that as well followed by a product never used that's coats the entire inside, dries to something like a rubber coating that is fuel proof once listed for obsolete tanks for restorations or whatever reason. Idle speeds below those specified by the manufacturer will affect the performance of the power steering pump, alternator and AC compressor. Check your carb baseplate gasket. TH 350 tranny had a 94 305 TBI which on the odd occasion would start running rough, did the same cap rotor swap still ran rough, checked codes, reset timing, finally by fluke I noticed one of the vaccum hoses came off of the egr valve (Not sure if its a valve as it was a plastic box on the passenger side of manifold next to TB), plugged it back in nice idle, same condition would happen every month or so I We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon. I am needing a little help with my 1992 S10 Blazer, 4. The flickering is a result of voltage surges. It works great except it is way too slow returning to idle. Why does my Chevy Malibu hesitate during acceleration, and P0507 Idle Air Control System RPM Higher Than Expected OBD-II Trouble Code Technical Description.

I have been trying to solve a rough/hunting idle that only happens when the engine is fully warmed up. Hello, My question is what could cause a high idle? I have a 95 Chevy pickup 4x4 with a 5. 5 turns out with the best idle vacume then I bet there's a vacume leak somewhere. Sometimes the car will die all together and then I have to put my foot all the way down on the gas peddle to get it to start again. Truck doesn't idle well, no power, surges, and it's running extremely rich. 1985-92 TPI Set Timing and Idle Procedure: SET TIMING 1 Use standard, accepted procedure to confirm Top Dead Center (TDC) of #1 piston agrees with 0 on timing mark. Consumer writes in regards to diesel engine failure - service bulletin refers to vehicle misfire/ runs rough due to a broken injector hold down clamp. The truck has full power while driving. Some older cars use a carburetor to process fuel, rather than a fuel injection system. 7L with 250,000 miles on it.

Marine Parts Expansive collection of electonic 155lx55wx45h dekit 225d at a range of prices. Idle BasicsAll carburetors come with a simple yet efficient idle circuit. 350 TBI motor has surge at cruise. 0L) and LO5 (5. I had a slightly high idle problem and a rough idle at times. the truck still has the airpump on and has a/c. 2011 Ford F-350. When I drive the truck the engine light will go on and off. When it rains all day my 1994 Chevy 4x4 350 TBI will not idle right It surges high and low and sometimes shuts off Checked the codes it says 33-MAP sensor and 13-O2 circuit Anyone have any info What would cause a Chevy 350 to Bog down at wide open throttle? Plugged fuel, air filter, or catalytic converter can cause that. 5 rated power valve.

If you have an automatic transmission, take the vacuum reading at idle in "Drive" (with the emergency brake on and the wheels blocked) and chose the power valve 1-2 inches below that figure. what do the chevy guys say? way the idle surges. That unburned charge from that miss is going to go into the hot manifold/header, and be followed up with still-burning gasses from another cylinder firing, and ignite in the manifold/header, giving you an after-fire (like a back-fire, but in the exhaust, not TBI definition. It has a rough idle and some times the idle surges. I have the Go Street 30003 and the Fuel Command Center on my Chevy 350 Van. I have to let the pump run 30 sec before I start it. On cars with carburetors (phased out through the 1980s), the most common problems include the distributor cap and rotor will the ECU/IAC "learn" over many weeks, or will in never re-adjust, until you do what you are saying to do The problem I have, after the car warms up, you can hear, and see on the tach, it doing a periodic "bounce" down from 900 rpm, or whatever it's supossed to be idling at all the time when warm. 00). Discuss 1994 z71,350 TBI surging idle when cold. But NO ONE, and this includes the Chevy dealer, could find the problem.

I have checked the pickup coil, it is 834 ohms. 02 envoy hesitation at idle surges at 2003 Chevy TrailBlazer LS I also have the stumbling and and erratic idle, so today while it was idling from 350=1,500 Car surges,idle goes very low and almost stalls when coming to a stop. What does a Throttle Body Do 1991 Ford Taurus Engine Surges I Have A Taurus Sho And When I Drive Chevy 350 Engine Wiring Diagram, Honda Aquatrax F12 3116 Cat Engine Idle Speed Hello i have a 1967 el camino 327 small block with a rochester quadrajet carb and a turbo 400 trans. Power surges 96 2500; 94 Chevy 350 overheats when temps fall below 0 deg; 93 Chevy C1500 (Cheyenne) Idle Issue; 1995 chevy c/k1500 electrical; DOWNLOAD A REPAIR MANUAL IN SECONDS. It Flacuates Between 350 And 1000 Rpm I have a 1998 GMC Sierra 5. it's in my buddy's 88 wagon and he loves his car but everyone keeps saying the engine is crap. Clean it up and clean it out. This is my first time owning a diesel. I have a 2002 zx9r. 7L.

Sometimes, the computer can tell you what is wrong [instructions]. i'm wondering if there is some blow by, or some sort of vacuum loss thru the EGR valve. Back out your idle screws 1/4 turn, that will stabilize the idle and help slow-speed metering. 7L) engines. I have changed the cap, rotor, throttle body, ignition module, egr valve, plugs, wires, checked fule pump, and filter. The engine runs fine when cold but as it warms up it starts to "surge" at idle and when you come to a stop it acts like it wants to stall then it grabs. Lots of folks lately with Holley issues. What does P0507 mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. The idle was stable with the 450 carb but now surges with the 650. The following procedure should be used to set the idle mixture and speeds.

This bulletin defines the controlled idle speed and minimum idle air rate specifications for 1987 and 1988 model year trucks for all engine applications with TBI. I tihnk the kit cost me $35 or something and the truck ran alot better afterward. i have a video of it doing it. Idling and driveability problems can be caused by a variety of issues. It was a GM buy-back, for the same reasons it's now having. TH 350 tranny Home Forums > Chevy Truck Tech Forums > Chevy Silverado Forum (GMC Sierra) > 94 silverado surges and dies when cold Discussion in ' Chevy Silverado Forum (GMC Sierra) ' started by Skandalist , May 13, 2012 . Off idle and during acceleration it runs fine. Coming out of a one owner pick up owned by a NASCAR driver of that era. I have 88 chevy tbi 350 that the rpm/engine surges up and down at idle after driving 2-5 miles. 1987 350 chevy small block, bored and stroked to 383ci mild cam (282/282 .

This is especially true if you aren't aware if all the possible causes of a problem. I have a 1996 GMC K1500 5. it runs fine when i first start it, but soon idles low/rough, but only in gear. GM Throttle Body Injection 1987-93 LO3 (5. Top 10 Causes of a Rough Idle | JL Motorworks IAC valve? The AAC valve increases the engine idle speed until the engine warms up and then the IAC is supposed to take over, provided it's clean, working properly and the manual idle speed adjustment is set low enough to allow the IAC to control the engine idle speed (should be about 675 rpms with the engine fully warmed up, the transmission in D and fully stopped with your foot on the brake). '89 350 tbi 5 speed stalling and surging idle The 1988 The TBI fuel pressure specification for small block Chevy’s is 9 – 13 PSI with the truck running. 7 Vortec 180,000K. 7 Tbi When At Idle It Has A Low To The Idle. 00 trying to find the problem for this. When a Ford Focus exhibits problems with running roughly at idle speeds, auto mechanics generally look first to either a vacuum problem, or more often, a problem with water getting into the Differential Pressure Feedback Sensor (DPFE), a part of the EGR (exhaust gas recirculation system).

my truck does something similar. Some four-barrel models have idle mixture screws on the secondary metering blocks too. When I let it idle, it surges really bad and dies. Re: Rough Idle May 28 2010, 1:42am i also have a problem with my truck on cold or rainy days my truck runs like crap but on hott days it runs great. 2004 3. S10 LT1-350 Posts 4,096. At first I could hear it out the exhaust, but now I can feel it with more, than less, engine braking. I have spark, but it seems like it is advanced or retarded. And you can also feel it at a slow Part 1: Testing MSD’s Atomic EFI In a Big-Block Chevy. 2 and it seems to be doing the same.

When the engine is started cold, regardless of the outside temperature, the idle is rough and there is a noticable power loss. Unplug the CTS runs perfect. Hi, I am having a problem with my chevy 350 engine that I just installed back in August. 7L 350 Vortec and I am having problems with it surging while it is in gear. A downloadable repair manual is a digitally delivered book of instructions that provides step-by-step maintenance, troubleshooting and repair procedures. The Impala is Chevrolet's popular flagship passenger car and is generally among the better selling American made automobiles in the United States. Again, my theory is that once the vehicle is at speed, the higher speed puts less stress on the pump because of the vacuum-like effect of the fuel being drawn out by the engine. any ideas? I have a 87 K5 stock 350 with TBI. 75 turns out on the A/F screws for the best idle vacume and rpm. Ever since then it surges really bad at idle, was backfiring through the tbi (running lean condition or timing), and would barely run.

If they didn’t do this I would not purchase the service or at least seek out a second opinion. 0 automatic nsx had timing belt,v/c gasket,oil pan gasket,valve adjustement,drive belts,o2 sensor replaced,cel light came on after repairs,found timing off,corrected car ran perfect for a week and then idle started going very low when coming to a stop. My recommendation, if you're having a rough idle and can get it going like I talked about, chances are it's the fuel system. It is intended to help you map out a troubleshooting plan. In gear, with my foot on the brake, the idle would surge from 600-900, maybe a 2 second cycle. Once you have ruled out all the basics, you can go back to what the Chevy 4. Damage to the car’s carburetor and vacuum hoses can cause the engine to misfire, resulting in a rough idle. Idle. The following checks should be made to repair a non-IAC system problem. my problem: off idle bog.

All right, we're through the Idle Channel Restriction and headed straight down to the idle discharge ports. Read more only at www. Service Repair Idle Manual Year Application: 1993 1994 See our Technical Resource Center. My main complaint with the v6 of that year model was that at idle there was a noticeable vibration in the steering wheel. it also seems the longer i sit the worst it gets. I put different heads on it with smaller valves and it helped a little. my question is will a combination of a toque converter out of a v6 700r4 stall be too low (1000-1100) a oem alternator from 3. Further information from the customer indicated that the truck misfired the worse in drive, not overdrive, at light to normal cruise around 2000 rpm to 2500 rpm. Cams with the least duration are listed at the top of the chart and are the more mild, street cams (see note on 0. In each case you will need to adjust all the idle mixture screws for proper operation.

I can dump gas down the intake and it still will not start. The dazzling example featured here, chassis GT40P/1074, earns bonus points for at least three reasons. 480/. Back to the Tech Page hey my 03 silverado 5. There are two idle mixture screws on the primary metering block of the carburetor. My son's has a If you're at 2. The 2013 Chevy Silverado is a very comfortable riding truck for the car is a 2003 nissan sentra spec v with the 2. I Have another trivia for you guys. Hello! I'm new to the forum though I have looked at some other threads. For some scan tools enter VIN 10th “L” 3rd “C” 8th “K”.

We've located a curated catalog at reasonable costs. The motor shut down, and everytime we went to start it there would be a loud whining/spinning noise. Mower Engine Surges At Idle,Get Your Eyesight Back Master Secrets To Perfect Vision Without Glasses In 6 Months By 1965 Chevy Chevrolet Chevelle El Camino Nova We've searched far and wide for an expansive array of listings in stock now. Chevy Truck Magazine This is an insert from an article on Q-jet Tuning Tips that appeared in the January 2000 issue. Watching the fuel pressure at idle stays around 5200psi and when it surges up goes to around 9000psi. When it is started cold, the idle surges from between 500-1500 until it is warmed up or you are driving down the road. the engine surges at low rpm while driving. [SOLVED] 95 Chevy S-10 4. I checked my EGR Valve and it was working fine. The following is a list of problem symptoms discussed in this guide: Engine Will Not Rotate; Engine Will Rotate But Will Not Start (Fire) Engine Is Difficult To Start When Cold 2004 Ford-f250 king ranch diesel series: engine revs up at idle over powering the brakes enough to cause the truck to jump forward between 1-2 ft.

no bad gaskets, fuel filter has been replaced, air filter, and PCV. Model specific subject matter experts, classified ads and more. This page is dedicated to the owners of these vehicles equipped with GM's dual point fuel injection (model 220 TBI). A Very Special Ford GT40. The idle circuit supplies fuel when the throttle plates are open only slightly. My problem is the truck surges at idle. Discuss all Chevy Impala 6th Generation Performance and Technical Discussion here. I financed a 2008 Chevy Impala for $11,836. If this is the one with the Chevy 350 motor with electronic ignition, you may need a new water pump. Help! Getting some weird symptoms while decelerating in gear (compression braking) that now seem to be spilling into some idle issues after it happens.

now it did it again and i couldnt get in touch with my favorite mechanic and i took it elsewhere. Checking your vehicle's fluid levels is always a good idea to maintain the overall longevity of the engine. and also my truck will not idel right until it hit operanting temp i have replace the coolant temp sensor and the egr valve i have a 92 chevy k-1500 with a 350 if any one any idea of what this is You might not notice such a miss at higher rpms that would be very apparent at idle. Edelbrock is the most respected name in performance. The holes in the baseplate where the idle mixture screws are located are called the idle discharge ports. My father in law's '91 Chevy was running poorly, so we put new plugs, wires, cap and rotor on it, and it's running better, but it it still surging at idle. The service engine soon light comes on after running a while. Disconnect power from the ECM for at least 10 seconds to clear codes (in case any are present) and reconnect the IAC electrical connector. This can be due to many possible factors, including a bad voltage regulator, an alternator that's not in good condition (possible bad diode, bad rotor/stator, poor internal connections), poor/high resistant charging system connections, poor/high resistant grounds, and also the idle surging is enough to cycle the alternator in/out of the charging Chevy Impala Forums > Content Wrapper 1991 Caprice, falls flat on it face, surges at idle? View Single Post post #9 of Old 06-23-2011 350 2-bolt, stock 4bbl 1999 Chevy Silverado - Sluggish Acceleration? I'm wondering if there's a problem somewhere like bad intake sensors or something. If you have access to a scan tool use a hook up for a 1990 350 cu.

You're not surging when you accellerate because the power-valve is open under laod and richening up the mixture. Buy your White 3 Gauge Set now! Reasonable prices on hub outdrive 30!Find our robust catalog of Hub Outdrive 30 in stock and ready to ship here. This is a discussion on 1990 Chevy Truck Idle Problem within the Automotive Support forums, part of the Tech Support Forum category. I have spent almost $1000. I have set idle mixture screws to factory recommended 1. Engine - Classifieds in York Springs, PA: 5039s Hemi Motor 331, 95 01 Chevy Truck Radiator, Cast iron Kohler engines, HARRIS CENTER CONSOLE PONTOON BOAT, 12 Ford Transit Connect XL. 7. I have had this problem for a while now (over a year) and decided recently to finally fix this problem; however, I am now in need of some expert help. i'm wondering what the engine would act like with a bad EGR valve? it's not stuck. Yeah, weather has SUCKED ASSSS here in the Northeast as well but I think weve turned the corner.

My son's has a [SOLVED] 95 Chevy S-10 4. 5l it has threw this p0507 high idle speed code every couple of days i clear it and it comes back in a few days about a week ago it started surging at idle and when you depress the clutch brake etc it will surge between 1200-1800rpms and never idles below 1200rpms i already changed the throttle body assy thinking it was the trottle position 1973 Chevrolet 350 Engine with carburetor - Rebuilt - $1000 (Humboldt) Carburetor version of the famous Chevy 350 engine rebuilt and ready to go. The carb I am using is a NOS Holley 9834-1 Here is what happens: Car starts fine hot or cold. The throttle body is pretty varnished, and looks to have a bad gasket in it. I get only about 10 mpg, it smells very rich, at idle especially, the exhaust pipes are black with soot, it surges and stumbles at red lights, the "service engine soon" light comes on at idle and Hello everyone, Im new to the forum. 5. Model: 1997 CHEVY. Heres my problem: If i accelerate my car from a dead stop the car hesitates upon acceleration from idle to say 10% acceleration, then it bucks forward. When i first start the truck it slowly rises from 1000 to 1500 rpm then comes down after five minutes to 1000 rpm then when i drive it for a few minutes then it starts idling at 1100 rpm when the truck is in drive. 080 over and a mild cam.

in. chevy 350 surges at idle

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