Question about 1995 Pontiac Grand Prix
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
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 .
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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
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
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
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