Gm 3400 High Idle


The recall began July 2, 2018. I know the quick idle, the one set by the cruise control, is an option. Once the idle is re-learned, your problem will be solved. The high idle was a vacuum leak - the gasket between the TBI and the intake manifold was bad. Disconnect the idle air adjustment valve and turn the idle screw. I still had the gasket from the previous engine and throttle body, so I threw it on there to see what would happen. City-Data Forum > General Forums > Automotive: early 90's GM 3. Step 1 - Finding the IAC. Gm 3800 v6 engine iac problem? My 2002 grand prix gt keeps idling extremly high. I googled it seems to be a pretty common problem but most say the normal fix of cleaning TB, replace sensors, or IAC don't resolve the problem. Ls1 Tuning Help High idle with new intake and Throttle body Okay so here's the skinny on what's going on with my project, I got it tuned for a thunder racing 3798R camshaft and 243 heads, and headers and exhaust. High idle CAN be added by your dealer by requesting a new program from GM. Generally one of four things will happen: 1. Engine is a TBI 454 7. Since your problem is intermittent there are a whole host of test that may need to be done to determine high idle. 7l engine with tbi. Have variable idle speed control at your fingertips. I bought my K5 with the Edelbrock 1406 already installed, and after cheching it out initially, I didn't realize that the idle was too high, 1100-1200 rpm. & GM P/N 88900060 for Canada. a common issue with these transmissions that can cause "surging" is the torque converter clutch, this takes the torque converter and eliminates slip buy locking it up, making everything direct drive when you are at steady cruise, saving on gas, issue is the torque converter clutches in these cars have a nack for acting up, they will kick on and off when you drive, and you will notice. The current readings are about 1000-1100rpm cold and 600-700rpm warm. idle 2 Answers. 2005 chevy impala holding high idle A temp sensor out of range giving a false cold reading can cause high idle. 8 Yesterday I set the throttle plates in drive with the foot on the brake. It does this whether truck is cold ar warmed up. Gauge started going way to high and I stop getting heat nothing but cold air and I changed the thermostat still have problem I checked my hose to firewall there hot and radiator hoses both hot and fans turn on. Below you will find the most complete list of Chevy trouble codes available. MoPar did this trick back in the early emissions days. Trouble Code 25 indicates that the Manifold Air Temperature sensor is reporting abnormally high readings. On starters with the solenoid on top (GM, most others) the solenoid grounds through the starter brushes, so when the brushes make bad contact you get the "silent treatment" when you turn the key. High idles may be commanded by the ECM for certain battery charging electrical loads or diesel particulate filter cleaning processes. Reasons for a Rough Idle or High RPM. That depends on the air/fuel ratio that is used, but a good rule of thumb is to divide this flow figure by 5 to get a hp capability. There are potentially other symptoms as well. This engine produced 220 hp (164 kW; 223 PS) at 6000 rpm and 220 lb⋅ft (298 N⋅m) at 3400 rpm. if found the iac was the problem becuase it was dirty, almost fell apart when i pulled it out, and i could change the idle by unpluging it and messing with its plunger length. The IAC valve controls the amount of air the bypasses the throttle plate, and is used to control the idle speed of the engine. UPDATED! SOLUTION IS HERE. I have a chevy c5500 Kodiak tow truck. High Idle after cleaning throttle body on 06 Chevy Cobalt LS. "SMOOTH" idle is as smooth or almost as smooth as a stock OEM engine and has high manifold vacuum, 18 inches or more. Connect an ohmmeter between the ECT sensor terminals, and set the ohmmeter scale on 200,000 ohms. GM Early Style IAC Adapter - Our part number IACGM-1 allows a GM early model year "threaded" style GM IAC motor to be mounted on an Accufab, Ford 5. At a full stop bring your engine RPM up to 1200 and you will know what I am have to deal with stopping at times. Reasons for a Rough Idle or High RPM. Check with PennTex to see if your later model GM or Ford vehicle will support a High Idler system. In 2006 we started offering carburetor parts for fellow enthusiasts, allowing one stop shopping for all their carburetor needs. 5L High Idle Posted to GM Driveability on 1/15/2014 8 Replies After installing new throttle body, we cannot get idle relearn to work properly. It comprises a plunger that fits within a bore of the throttle body, and a stepper motor that moves the plunger. Easy to install with factory plug-in connections. HUGE difference!!! Much better start up, better idle, better acceleration. What is the normal (expected) idle under normal weather conditions. Specification. 3 v6 5 speed manual 63,000 miles Driving on the highway I downshifted while braking for a ramp and all the sudden my engine idle got stuck between 3800 and 4300 rpms. dragosljvich. Idle speed descriptions are included below. 1997 Chevy K2500HD Ext/SB 6. Disconnect the idle air adjustment valve and turn the idle screw. Vacuum leaks are hard to find especially when the idle is high because it's blowing air around. The best prices on outlet decoration 2x stainless! Featuring our big assortment of Outlet Decoration 2x Stainless for sale here. com Car Chat > Pontiac > Grand AM > Tips and Maintenance > Idle Air Control(IAC) Testing Replacing -Cleaning for 99+. 050 durations 8 to 10 degrees larger. What Is The "high" Normal Temp Fro A 454 At Idle?? i DON'T KNOW IF i AM CONCERNED ABOUT NOTHING OR NOT, i HAVE A 39 CHEVY COUPE WITH A WALKER 4CORE RADIOR,, A 3,000 CFM PULLER FAN. Problem is not always the IAC motor itself, but rather the seat withing the throttle body. I just took my upper intake off to replace my fuel pressure regulator, put everything back together, and now, I have an extremely high idle. it has a 600 cfm edelbrock carb but when i adjust the idle screw down the engine shuts off. Leading provider of high performance automatic transmissions, torque converters and drivetrain components for race, street/strip, hot rod, street rod and towing TCI Stall Speed Chart JavaScript seems to be disabled in your browser. I have a 95 Chevy K1500, 350 auto with about 279,000 miles. This is causing it to slam into gear and run like ****. Easy to install switch that will activate the high-idle mode on the Duramax engine for cold weather or PTO. 2007 CHEVROLET SILVERADO 4. It's almost as if someone if stepping on the gas, but it will also randomly fix itself as you see at the end of the video. Specification. 3 liter S10 idle problem? So when I start it up it idles from 1500 to 2000 rpms in park or neutral. I ordered the high idle option and it appears to operate the same as the regular elevated idle. That depends on the air/fuel ratio that is used, but a good rule of thumb is to divide this flow figure by 5 to get a hp capability. I've put a new ECU in and still no change with the shifting. I have 91 chevy k1500, It does this, Sometimes it will idle a few minutes, then jump to high idle and check engine light comes on, And sometimes its as soon as i start the engine I was told it. I have taken it to a half a dozen mechanics, promising me that they could find the problem. Details about Idle Air Control IAC Valve for Buick Chevy Pontiac Oldsmobile V6 3800 3. Again, start the engine and compare how it is running at a stop to how it normally runs. Now start the engine and set the idle speed to around 850 rpm with the idle-speed screw. 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. The line of six cylinder engines used in Chevrolet light and medium duty trucks are very tough and durable. I turned my high idle option on in the vehicle settings mode in the radio screen. From buying research to owner support, join 1. 7L, TBI, 260K on the motor at idle, it's extremely high, around 1600-1800 RPM's when put it drive, drops down to about 1000-1200 (still way too high) I've put a new IAC (idle air control) valve in, checked my timing. You can usually figure out what's causing a high idle problem and estimate the cost before you open your wallet. Seriously though, what you are describing is pretty 'normal' behaviour for the 3. The engine has a 87. That did not do it I have only driven about 50 miles since which was ony 2 starts 25 miles each way. 8L with a High Idle. Faster engine warm-ups Easy to install switch that will activate the high-idle mode on the Duramax engine for cold weather or PTO. So the throttle was acting as if it was getting stuck right around the 2000 RPM mark here and there. replaced sensors and cleaned carbon from throttle did not help. 4L LA1 (3400) Specifications Application. An air or vacuum leak would allow unmetered air to enter the induction system downstream of the mass airflow sensor, causing a lean air-fuel mixture that creates a high idle speed. Chevy TBI high idle speed - why? I have checked all vacuum hoses, made sure the accellerate cable is free etc. I have since swapped out the air idle control valve and the throttle position sensor and the high idle went bi-polar on me and now the idle is so slow it won't stay running. Check and make sure the air. You may have to register before you can post: click the register link above to proceed. It has an excessively high idle speed. I've got a 2002 Chevy Impala with a 3. I am not very mechanically savvy, but I do have some idea. There was a car with a very puzzling high idle concern in my shop recently that got me interested in the problem so I have been working on developing a diagnostic process for dealing with it in the future and doing research on the issue in general, by no means am I claiming to know it all, but I'm presenting the things that I have found. It doesn't sound too much but subjectively it just runs too high. If not, thats a contributing factor to the high idle. When I'm at idle like at a light it jerks, and the whole car shakes as I speed up it shakes some, and when slowing down it does the same thing. when the engine is cool, there is no knocking, but once it gets warmed up it starts aknockin'. 2800 ST/3400 ST Advenger ® Adgressor™ SC6000™ SC6500™ SC8000™ SWEEPERS Terra® Proterra™ SW900™ SW900™ Commercial SW4000™ SW5500™ SW8000™ Terra® SWEEPER-SCRUBBERS CS7010 7765 VACUUMS Canister Adgility™ Euroclean GD930 VP300 VP600™ Upright ReliaVac™ VU500™ Spectrum™ CarpeTriever™ Wet/Dry VL500: CARPET EXTRACTORS. The code definitions are a good starting point when determining the cause of the service engine light but where do you go from there?. While the code specifically mentions the "Idle Air Control System", it would be a mistake to just go ahead and replace it without a little due diligence. What Is The "high" Normal Temp Fro A 454 At Idle?? i DON'T KNOW IF i AM CONCERNED ABOUT NOTHING OR NOT, i HAVE A 39 CHEVY COUPE WITH A WALKER 4CORE RADIOR,, A 3,000 CFM PULLER FAN. It had deteriorated over time, and started sucking in air from the back of the throttle body. 2002 Chevrolet Malibu Has A Very High Idle 2002 Chevy Malibu w/3. The 3400 engine has a strong, ribbed cast aluminium oil pan. Ok people, so after many months of frustration and pulling my hair out, I finally got to the bottom of my high idle problem. 4L) This article will take you step by step thru' the testing and troubleshooting of the throttle position sensor on your GM 3. The sensor basically looks at idle or closed throttle (IDL) and throttle angle opening (VTA). 0 normal idle oil pressure Just looking at the standard gauge in the dash. Removing Idle Stop Cap from a GM TBI and Adjusting the Idle Set Screw For whatever reason you have determined that you need to adjust your base idle on your GM TBI vehicle. Those idle at 2000 RPM for 15 seconds on cold start. These are 100% BRAND NEW so there is NO CORE CHARGE. Easy to install! Selectable ranges - 800-1800 RPM. All of these engines are 12-valve cam-in-block or overhead valve engines , except for the LQ1 ; which uses 24 valves driven by dual overhead cams. Since your problem is intermittent there are a whole host of test that may need to be done to determine high idle. I had to bump the idle of the truck up just a bit, probably less than 100 more rpm. Check out the deal on BD 1036600 High Idle Control 01-04 6. The problem I'm having is high idle. A vacuum leak on a fuel injected engine will cause high idle. 4L engines (vehicle, gasket, idle, convertible) were the 3100 and 3400 SFI V6's from '94 to. 3L High Idle Problems - Need Help! Can you help me figure out my 1998 4. Open air like outside is best for this test because it's dangerous!!!!!. These idle up speeds may occur with no input from the customer. Ok people, so after many months of frustration and pulling my hair out, I finally got to the bottom of my high idle problem. This is causing it to slam into gear and run like ****. 7L - Problem Solved-----Da Problem-----Many thanks for helpful suggestions and insightful comments about high idle problem on my 88 Chev conversion van with the 5. 7 Idle surging,stalling in the alt. 7L, TBI, 260K on the motor at idle, it's extremely high, around 1600-1800 RPM's when put it drive, drops down to about 1000-1200 (still way too high) I've put a new IAC (idle air control) valve in, checked my timing. The troubleshooting procedure for high and low idle conditions are similar, which are included in the following: Difficulty Scale: 4 of 10 Step 1 - If the check engine or service engine light soon has illuminated retrieving the diagnostic trouble codes could lead you in the right direction of what the problem is, or is related too. The Chevy Monte Carlo is a luxury coupe that was discontinued in 2007. No check engine light and no Diagnostic Trouble Codes. At times the idle is high and it pulls the car. Once you have reset the timing limiter, reinstall the clip that holds the point cam on the shaft, the advance weights, springs, and breaker plate. Typically as the IAC’s pintle extends, air flow to the engine is restricted as the air passage is shut off. We are excited to offer this 2013 Buick Regal. Once they are both open the same, adjust the idle speed screws, little bit on each carb to get the idle down to a deceit rpm. Check out Rocket Star-Idle Space Factory Tycoon guides, tips, cheats and strategies. - done all the basics and even replaced the idle valve - but still the idle is too high - Cheyenne P/U 1989 - 305 small block with TBI injectors. Operation is simple using only your cruise switch, no extra switches to mount or hide in your truck and features fool proof operation. Pay attention to low idle or stalling. APPLICATIONS 1. The current readings are about 1000-1100rpm cold and 600-700rpm warm. What is the normal (expected) idle under normal weather conditions. Current Sonic Issues idle and AC problems Well I have been waiting to post on here but I am running out of ideas and the response of "its normal" is getting old. it runs fine when i first start it, but soon idles low/rough, but only in gear. in the chilton book it tells you idle is autmaticly adjusted through the computer so thers not a hell of alot you can do it about it but it says if absolutely needed you can remove this seal behind the stop screw. I have worked for GMC as a tech in the past during the years this truck platform was sold. 5 bathrooms. It does this whether truck is cold ar warmed up. I didn't mess with any on the idle mixsure screws or idle speed screws as of yet. Rebuilt the Distributor, New Coil, Alternator, Fuel Pump and filter, New Cap Rotor Plugs and Wires, All vacuum lines Are correct and TIGHT, New Thermostat and Radiator and Heater Core, New TPS adjusted to. 5L Diesel Specs, History, & Info. The motor shut down, and everytime we went to start it there would be a loud whining/spinning noise. IAC, EGR, EGR controller, MAP, temp sensor, vacuum leaks, O2 etc. Take your terminal connector and attach enough of the supplied wire to reach the location where you plan to mount your switch. I know this can be done by the dealer with the tech 2 programmer. Surging idle can be caused by a number of different problems. 1971-72 Models [cf2]Adjust with air cleaner installed. This article will help you to understand some of the most common causes of misfires and misfire codes (P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308) on the GM 4. Radiator Express is an online leader in radiator distribution to retail markets. I replaced head gaskets, intake manifold gaskets, timing chain and sprockets, including the timing gasket. When I first start it up, it's very rough - the idle will bounce high for a bit a few times like it's trying to find the right mixture. 46 in) bore and stroke with a 10. If I goose the throttle cable by the throttle body it revs to 2500 rpm then comes back down to 1500 rpm. 5-05 GM Duramax (VIN Code "2") Full manual control of the elevated idle on your Duramax truck is possible with our High Idle Kit. Learn what does P0300 Chevrolet Cylinder Misfire Detected Random Cylinders means, location and how to repair? When a misfire occurs, engine speed will fluctuate. On Tuesday, GM idled its plant in Silao, Mexico that builds Chevrolet Silverado and GMC Sierra pickups due to a parts shortage from the UAW strike. Shop BD-Power 1036600 High Idle Switch for the 2001-2004 GM 6. 1) I have been getting the P2196 18628 Oxygen Sensor Signal too High (Rich)-Intermittent. I've been working on this issue for a few weeks now and have hit a wall. Those idle at 2000 RPM for 15 seconds on cold start. by Kyle McFadden. 2005 silverado reg cab short bed 2wd 4. It does this whether truck is cold ar warmed up. In order to be able to post messages on the Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum forums, you must first register. I know this can be done by the dealer with the tech 2 programmer. Check engine warning on dash. The recall began July 2, 2018. GM 3400 mystery misfire was created by tomatofarmer1 I recently did an extensive repair on my 2002 Chevy Venture with a 3. my uncle has a 95 silverado 4. Restart the engine, and give it 12-15 degrees of advance at idle, and go for a spin. Turn the idle speed screw out to lower the idle speed to around 500-600 rpm. Need to replace your Chevy Monte Carlo Idle Air Control (IAC) Valve? Then shop at 1A Auto for a Idle Air Control Valve replacement for your Chevy Monte Carlo at a great price. The DIS-4 Plus HO Ignition produces an incredible 170 millijoules of spark energy with 470 primary volts. Chevy Venture Starting/Stalling/Idle Issues it probably flickers more because the fan running on high speed is a pretty big electrical draw. I have worked for GMC as a tech in the past during the years this truck platform was sold. Discussions are on-going between negotiators for the UAW and GM on day 3 of the UAW's nationwide strike. GM > Engine > Spark Control > Spark Advance. I have a 1999 Chevy Silverado 1500 (5. Check engine warning on dash. I have spent almost $1000. Fill until at the normal level, then start it and put the heat on high. HUGE difference!!! Much better start up, better idle, better acceleration. The idle circuits in a GL1000 are ridiculously small, so slight problems are greatly magnified. If the idle is low and inconsistent, it may be due to an issue with your idle control valve. Part numbers 1110018, 1110020, & 1110022. High readings thus indicate a possible bad sensor or short in the MAT circuit. Seriously though, what you are describing is pretty 'normal' behaviour for the 3. The dealership would only reprogram the throttle body position sensor, but it was still doing it. A neighbor of mine has tried to get it done, but every dealer first gives him crap about it, and then wants to charge big money to do it. Trouble Code 25 indicates that the Manifold Air Temperature sensor is reporting abnormally high readings. Up went the output: 216. Replied by fredsmythson on topic GM 3400 mystery misfire Here is a comparison of what happened with my Lumina: * Sometimes the car will run very smooth initially at idle, until it warms up a bit. Quick and easy install, the High Idle switch mounts on the dashboard and plugs in under the dash. Two or three high idle speeds (900-2400 RPM) allows utmost precision and control. a common issue with these transmissions that can cause "surging" is the torque converter clutch, this takes the torque converter and eliminates slip buy locking it up, making everything direct drive when you are at steady cruise, saving on gas, issue is the torque converter clutches in these cars have a nack for acting up, they will kick on and off when you drive, and you will notice. My dad asked me this week if i could get the old 87 1 ton chevy dump body running again, It's got a TBI 350. 5 for the 1992 model year, and it altogether replaced the 6. Most compression BBC's like lots of initial/low end spark advance. The Idle Air Control Valve is often not the cause of the code. OHC Compression Tester (5-piece Kit) $32. I checked vacuum leak several times with different techniques but never found one. From buying research to owner support, join 1. BD High Idle Kit for 2001 - 2004 Chevy GMC 6. Apparently these late 80's early 90's Chevy 350 TBIs are known for developing microcracks in the Distributor Shaft, which decreases magnetism and can cause this problem. The line of six cylinder engines used in Chevrolet light and medium duty trucks are very tough and durable. Hey guys, lately my truck will randomly kick up the idle in park to around 1200 rpms. Limped home with the truck under what seemed like constant 20 percent throttle while in gear by itself. The IAC valve controls the amount of air the bypasses the throttle plate, and is used to control the idle speed of the engine. I have the idle mixture screws only 1/2 turn out, and I backed the high idle screw on the electric choke almost all the way out. Once the engine is warm there is no problems with the Idle being high with TPS being connected. Is your vehicle hard to start? Does it miss under load and idle rough? Is your gas mileage not what it used to be? Your ignition system may need repair, but before you waste. I get a P0507 DTC. Antique Cars Classics Customs Hotrods Leadsleds Roadsters Streetrods Trucks Turbine Car 40 31 Ford 67 Dodge Charger 61 Chrysler Images Specs Pictures Photos. The TPS itself is simply a linear variable resistor that when driven by the ECU produces a linear voltage in a 0-5 volt range, 0 volts being idle and up to 5 volts representing. Once the idle is re-learned, your problem will be solved. Average failure mileage is 2,400 miles. I've been working on this issue for a few weeks now and have hit a wall. You can try cleaning it and see if that improves your idle speed. 5 acre lot and features 4 bedrooms and 2. HIC 700 Voltage Monitor. by Kyle McFadden. This is what I have done to date: Replaced IAC, MAF, TPS, Fuel pressure regulator, PVC valve. PowerMaster High Idle Amperage Output Alternator From Powermaster. I thought the throttle body gasket may be the culprit so I sprayed carb cleaner while the engine was running around intake gasket and throttle body gasket to check for possible. IAC Replacement. AC Delco sparks and wires, K&M filter was JUST put on, rear O2 sensor was just replaced and all of that was after the rough idle started and none of it helped get rid of the rough idle. That did not do it I have only driven about 50 miles since which was ony 2 starts 25 miles each way. GM 3400 mystery misfire was created by tomatofarmer1 I recently did an extensive repair on my 2002 Chevy Venture with a 3. Shop Chevy LS V8 Camshafts and get Free Shipping on orders over $99 at Speedway Motors, the Racing and Rodding Specialists. Setting Minimum Air Idle Speed Serpentine Belt Adjustment Check TPI Manifold Tightening S equence Setting TPS idle voltage Fuel Filter information. 00 Add to cart; 2011-2016 GDP Chevy/GMC Duramax LML DSP-5 SWITCH – GREEN W/HIGH IDLE EFI LIVE/EZ LYNK GDP411018 $ 218. Many other indicators on as well. Q: High Idle My car has an automatic transmission. - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. GM OBD1 Adapter $34. The 3400 engine has a strong, ribbed cast aluminium oil pan. Step 1 - Finding the IAC. This company is not yet accredited. PO said he purchased a new carb for it and I noticed the stepvan was running funny at idle when I originally took it for the initial test drive. That depends on the air/fuel ratio that is used, but a good rule of thumb is to divide this flow figure by 5 to get a hp capability. I am assuming your carb has an electric choke. 6L Duramax LBZ is an adjustable switch that will activate the high-idle mode on your truck. If it does not idle, you are looking for a problem with IAc. I'll start from the beginning. The line of six cylinder engines used in Chevrolet light and medium duty trucks are very tough and durable. 3 v6 5 speed manual 63,000 miles Driving on the highway I downshifted while braking for a ramp and all the sudden my engine idle got stuck between 3800 and 4300 rpms. There are a lot of factors that affect the balance of volume versus velocity and sometimes it's best to call in the pros. Just to recap, my rig would idle at 1700 ish even after it was up to temperature. Idle quality and engine vacuum should be near-stock. '91 Chevy 350 TBI surging at idle and stumbling at speed Howdy - 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. Selecting the right camshaft is serious businessand can be seriously confusing. If you are looking for a great radiator purchasing experience and low radiator pricing then you have come to the right place. These sensors are inexpensive (roughly $ 18 US) GM units readily available from any parts store (GM part number 12146312, may have been replaced by #15326386). changed the idle control motor and adjusted according to the manual. Vacuum leaks are hard to find especially when the idle is high because it's blowing air around. The underlying problem was the distributor. 4l engine that is randomly running at high idle. Easy to install with factory plug-in connections. High Idle Hi guys, I use EFI Live on my 04 GTO and 00 WS6 and was wondering if there was a way to use it on my 98 Chevy 3500HD(454) Tow Truck to raise the idle for the pto. Check it for interference. 5L GM/Detroit Diesel 6. This product allows for the engine idle to be set at 3 predetermined points (between 750 rpm and 1,800 rpm) to facilitate faster engine warm-ups, electrical system charging or even having the A/C or heater working at its optimal capacity. 6L Duramax LLY works in conjunction with the GDP EFILive Tuning. 6L Duramax LLY is an adjustable switch that will activate the high-idle mode on your truck. 1 is the tube and/or fittings on the tube supplying vacuum to the PCV valve. Some months later, the high idle problem happened again. My Equinox has no power steering is very stiff, no power assist. 8 HIGH IDLE Replaced throttle body , and vehicle will not take idle relearn, idles at - Chevrolet 2007 Silverado 1500 2WD question Search Fixya Press enter to search. City-Data Forum > General Forums > Automotive: early 90's GM 3. The small wire going to the starter solenoid shouild get 12 volts or so when the key is turned to "start". ACL Race Series. Exclusive Content. The idle will relearn if you put the vehicle in drive and allow the idle to come down with all accessories off for about two to three minutes. it runs fine when i first start it, but soon idles low/rough, but only in gear. 2L street engine in our portfolio – and one that has an edge to it. There is a history of ERG pintle proformance problems and many were replaced with low miles on the vehicle. Another thing to remember is GM has bugs too. 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. or to much air entering the system through the throttle body. From buying research to owner support, join 1. 1971-72 Models [cf2]Adjust with air cleaner installed. I enjoy the technical articles the magazine publishes. High Idle & Valet Switch for the 2004. Cranks up fine and hits the high idle point, but instead of falling on it's face for a second, it drops down to 650 RPMS, the same RPM it would be sitting at when warm. The table below will help you select the right camshaft for your Pontiac engine. Learn about this problem, why it occurs, and how to fix it. 5-2006 Chevy/GM LLY Duramax Diesel equipped 2500 & 3500 trucks, by PPE. when engine warms up, the idle rpm rises to 1700-1800 rpm. High Quality Idle Control Valve for GM 17112350, OEMNO:17112350, Application:GM, Find detailed product information for High Quality Idle Control Valve for GM 17112350 and other products from Ruian MAC Auto Parts Co. Don't worry about it and drive! You'd be having kittens if you had a new Mazda3 with the Skyactiv engine. Fuel economy should be fairly decent for a nearly 400-cubic-inch engine, especially if you use an overdrive transmission to keep engine speed low. culprit was the centrifugal advance and some carb issues. Check it for interference. Anyone have trouble with the high idle / throttle not backing off? Slowing down on the freeway, on the brakes, I have the signature 1200 RPM on the tach. According to the scan, everything is acceptable while driving. With its bold proportions and broad-shouldered appeal, Silverado owns the road. 25 ring and pinion, automatic transmission with stock. There are many others that will do the same thing but the 1227747 is most well known and documented and will be the basis for this article. Hi-Rise - Automotive Fuel & Air System Intake Manifolds GM LS Carburettor Hi-Rise. PowerMaster High Idle Amperage Output Alternator From Powermaster. He also mentioned that it was the same as some GM Idle air control valves. The IAC valve controls the amount of air the bypasses the throttle plate, and is used to control the idle speed of the engine. The code definitions are a good starting point when determining the cause of the service engine light but where do you go from there?. Chevy uses a simple idle relearn process. High Idle Right After Cranking Have a minor but annoying issue with my tune. 3L 1955, Race™ Connecting Rod Bearing Set by ACL®. When the engine is cold it idles at 700rpm but after it goes down to 500-550 and thats when for instants it seems like its choking. GM OBD1 Diagnostic Trouble Codes & Cures This General Motors Corporation OBD I diagnostic page explains the codes, the most probable cause and what conditions are required to set the code. Discuss 1990 TBI 5. After the truck is warmed up it will idle high after driving it and then putting it into park it normally idles at 600 when warm but now it will be close to 1000 or sometimes a little higher. With a cam the idle usually needs to be higher on auto. ok so willett you know i know exactly what you are talking about my carb is the same way. TCI 11" Breakaway Torque Converter 1962-73 GM Powerglide Aluminum Case TCI. "SMOOTH" idle is as smooth or almost as smooth as a stock OEM engine and has high manifold vacuum, 18 inches or more. Re: 2004 Pontiac Grand Am high idle problems This may be totally off base but I inadverntently ruined the oxygen sensor in my Caravan by using carb cleaner. 050 durations 8 to 10 degrees larger. of torque at 3900 rpm. There are many others that will do the same thing but the 1227747 is most well known and documented and will be the basis for this article. Ensure timing is set properly, and that electronic timing advance is functioning. 6L V8 Duramax diesel: 2004 late, 2005 GMC GM Chevy Chevrolet 6. it was still idling high 2,900 rpm. PAG Oil GM P/N 12378526 for U. High Engine Idle So, What can cause abnormally high engine idle speeds. The idle will relearn if you put the vehicle in drive and allow the idle to come down with all accessories off for about two to three minutes. Full manual control of the elevated idle on your Duramax truck is possible with our High Idle Kit. High idle CAN be added by your dealer by requesting a new program from GM. High Idle Kit for 01-06 GM 6. The high idle was a vacuum leak - the gasket between the TBI and the intake manifold was bad. I still had the gasket from the previous engine and throttle body, so I threw it on there to see what would happen. Step 1 - Finding the IAC. 4L) This article will take you step by step thru' the testing and troubleshooting of the throttle position sensor on your GM 3.