Question about 2007 Pontiac G5 Gt Coupe

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High idle at start after cleaning throttle plate

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Posted on Jan 02, 2017

ftw1952
  • 10319 Answers

SOURCE: My 2004 Pontiac Aztek is reving and idiling really

replace the idle air control Thqat is all you need to do and it is a self learning part with no adjustments needed

Posted on Apr 17, 2010

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Why does my 2004 buick rendezvous idle at 3000 rpm and put in gear it drops to 1500 rpm and shifts hard while driving due to high engine speed?


Stuck throttle plate . gummed up with varnish or a problem with IAC valve . IAC - idle air control valve ! Videos on youtube , how they work how to clean . Idle Air Control Valve Could have unmetered air entering the engine pass the MAF sensor , a bad MAP sensor ! I would check the throttle plate first , if dirty clean it . Then check IAC valve if not the throttle plate . GM Idle Air Control IAC Function Diagnostics and Repair

Dec 14, 2016 | Buick Cars & Trucks

1 Answer

WOULD A IDLE CONTROL VALVE/IDLE AIR CONTROL BE CAUSING MY 2000 CADILLAC DEVILLE TO IDLE AT 1400 TO 1750 RPM SOMETIMES IT IDLES OK..IS IT A HARD FIX..THANKS...


Try cleaning the throttle plate first . I wouldn't just change the IAC valve without testing , hooking up a scan tool that show engine data.
A few different thing's could cause high idle .The idea is to test all thing's that could cause a high idle till you find the problem. Vacuum leaks , throttle plate sticking because it's gummed up with carbon , varnish build up . Or is the PCM/ECM making it idle that hight etc... Is the throttle cable bound up.

Dec 07, 2016 | 2000 Cadillac DeVille

1 Answer

Correct code P0504?


What Colorado do you have ? 2 wheel or 4 wheel drive ? Sport ,sport LS 3.5L , Z71, Z71 LS. etc. what size engine ? an does it have electronic throttle control ? I have factory service info an it is not showing that code .
DTC P0506

Circuit Description

The throttle actuator control (TAC) motor is controlled by the powertrain control module (PCM). The DC motor located in the throttle body drives the throttle plate. In order to decrease idle speed, the PCM commands the throttle closed reducing air flow into the engine and the idle speed decreases. In order to increase idle speed, the PCM commands the throttle plate open allowing more air to pass the throttle plate. If the actual idle RPM does not match the desired idle RPM within a calibrated time, this DTC sets.

DTC Descriptor

This diagnostic procedure supports the following DTC:
DTC P0506 Idle Speed Low
DTC P0507

Circuit Description

The throttle actuator control (TAC) motor is controlled by the powertrain control module (PCM). The DC motor located in the throttle body drives the throttle plate. In order to decrease idle speed, the PCM commands the throttle closed reducing air flow into the engine and the idle speed decreases. In order to increase idle speed, the PCM commands the throttle plate open allowing more air to pass the throttle plate. If the actual idle RPM does not match the desired idle RPM within a calibrated time, this DTC sets.

DTC Descriptor

This diagnostic procedure supports the following DTC:
DTC P0507 Idle Speed High
Cleaning the throttle body mite take care of it !
Cleaning Cleaning An Electronic Throttle Body Safely

Jan 31, 2015 | 2005 Chevrolet Colorado

1 Answer

2001 Taurus 3.0 dohc idles high sometimes and once in gear transmission seems to shift at idle.


I think it may feel like that because it is idling high. For you high idle problem there are a few thinks you can look at one a vacuum leak. Two look at the throttle body plate and idle air control motor. If the throttle body plate are dirty the seat for the idle air control motor my be dirty. I would try cleaning the throttle body.

Nov 10, 2013 | 2001 Ford Taurus

1 Answer

1992pontiacsunbird3.1runs at about 3000rpms and is hard to idle down sometimes it does


start by cleaning out the throttle plate and bore using a can of spray carb cleaner and some rags. deposits may be causing the throttle plate to bind causing the high idle. A vacuum leak at a cracked vacuum hose can do the same thing. There is a device called the IAC, idle air control valve, that may need cleaning as well. The IAC controls the idle speed. remove it and spray with carb cleaner.

Apr 29, 2011 | 1992 Pontiac Sunbird

1 Answer

When i start it up it idles high and low.Feel like theirs no gas .In about 5 minues it runs normal. can anybody help me?????


Clean or have cleaned the throttle body and idle air control motor. Use carb cleaner and a tooth brush and clean the back of the plate in the throttle and as far back as you can. you will have to take the idle air control motor off to do a thurough cleaning on it

Nov 11, 2010 | 1995 Buick Park Avenue

1 Answer

Motor dies unless you keep your foot on the gas, but not all of the time. sometimes hard to start.


Sounds like an idle problem. The solution should cost you nothing. Remove the air trunking between the air cleaner and the throttle body. Have a clean cloth and some WD40 spray ready. Clean the throttle interior and the outside of the throttle plate. Apply pressure with your finger tips to the throttle plate to rotate it and continue cleaning the throttle area behind the plate and is possible the back of the throttle plate itself. Pay special attention to the edges of the throttle plate. Mounted onot the the throttle body exterior you will find the idle air control valve. This is an electrically operated device that permits measured amount of air past the throttle plate when the engine is at idle to ensure that the engine does not stall. These idle controllers can take two forms a) a simple valve on a passageway around the throttle plate or b) a geared motor that opens the throttle plate a tiny amount. Which ever system is used everything should be spotlessly clean. The IAC valve body can be removed to aid in the cleaning process. Take care not to rip any gaskets etc as you can use them again during reassembly. With everything cleaned up it should be much better. Put everything back together. If problem persists check all vacuum pipes making connection with the inlet manifold for leaks; spraying suspect areas with WD40 will result in a small jump in revs if you hit on a vacuum leak. Also check that your EGR valve is functioning properly and is closing at idle.

Oct 09, 2010 | 2003 Jeep Grand Cherokee

2 Answers

2004 GMC Envoy Idling high


sounds like the throttle plate is stuck try cleaning is out do not push on the throttle plate will damage it. have some one sit in the vehicle with their foot on the pedal take a tooth brush and some carb cleaner clean both side of the plate and inside the housing the best you can and see if the stops it.

Aug 30, 2009 | 2005 GMC Sierra 1500 Hybrid

2 Answers

The throttle sticks during the warmer months


The throttle body is located on the driver side of the engine compartment.
If throttle plate has not been clean you might want to get a can of carburetor cleaner, remove the inlet snorkel hose and clean around and behind the throttle plate.
The IAC (idle air control) motor may need to be cleaned. The IAC controls your idle rpm.
Good luck, let me know.
Regards,

Apr 27, 2009 | 2001 Chevrolet Malibu

2 Answers

Idle runs too high when I come to a stop, for about 5 seconds.


The throttle body may need to be cleaned. Take off the induction hose to the throttle and open the plate. Make sure the vehicle is not running. With the throttle plate wide open, soak a cloth rag with carb and choke cleaner and work the rag around the inside of the body especially where the plate's closed position is. remove the rag and spray a small amount of carb cleaner down the throat of the throttle body. replace hose and run vehicle at 1500 rpm's for a few seconds. This should fix the idle. It should be idling at about 800 rpms.

Apr 24, 2009 | 1999 Saturn SL

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