Question about 1995 Pontiac Grand Prix

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High idle car idles at 1500 rpm when warmed up. should be around 800 rpms

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  • 110 Answers

Sounds like idle speed control unit needs to be cleaned or replaced side of air intake unit should have electrical connector

Posted on Dec 29, 2013

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Posted on Jan 02, 2017

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fixincars
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SOURCE: high idle and engine getting hot

most common thing for this is either a failed coolant temp sensor that is not telling the computer that the car is warmed up and it is still running at cold Idle speed adn the code will tell you that.
Or a vacuum leak and the computer is trying to make up for the leak my making changes to the fuel deliery to keep the engine running .
If you find this information helpful please give me a fixya! Rating and if you need more help on this problem please contact me.

The only way to find out what code is stored in the computer and what turned the check engine light on is with an OBDII scan tool and also the only way to turn off the light but just turning off gthe light does not fix the problem, as soon as the computer does it checks again and you have completed the predetermined dive cycles the light will return so the only way to keep the light off is to properly repair the reason it was commanded on in the first place!

Posted on Aug 23, 2008

  • 1 Answer

SOURCE: my engine idles very high, i can rev the throttle

throttle position sensor (TPS) possibly

Posted on May 04, 2009

  • 41 Answers

SOURCE: 2004 Grand Am With High Idling Problems too!

Make sure your throttle cable is not bound up on anything. Also where the throttle cable ends at the throttle body make sure it moves freely and there is nothing obstructing its movement..Rpms are a little too high to be a vacuum leak.

Posted on Jun 24, 2009

  • 3640 Answers

SOURCE: 96 bonneville high idle when cold

check or clean out throttle body at throttle plate it may have carbon build up on it. also make sure air filter is clean and check or replace the intake air tempurature sensor.(iat) sensor. the sensor is under 20.00, the sensor is after air filter in the big hose to throttle body.

Posted on Feb 15, 2010

  • 6 Answers

SOURCE: 2000 PONTIAC GRAND AM GT

Make sure you check your vacuum hoses. This could cause a high idle.

Posted on Sep 23, 2010

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Cars are design to run at a higher idle at start up to warm them up quick. There is a sensor that reads water temperature and tells your car's computer how fast to idle. Your RPMs seem slightly high but not out of the norm. Does idle ever drop to around 600/800 after about a minute? If not, your engine temperature sensor maybe defective.

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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.

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