Question about 1989 Pontiac Grand Prix
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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
There's two sending units in the intake. The little on with single prong at the t-stat housing is for the guage and the bigger one plastic connector is for ecm.
Your signal is getting grounded somewhere.
Posted on Mar 17, 2009
SOURCE: Chain smoker
Turbo oil seal is probably bad. This lets oil leak into the air intake from the turbo bearing. If smoke goes away during hard acceration, then this is probably your problem. Turbo replacement or rebuild is the fix for this.
Posted on Mar 23, 2009
SOURCE: Radiator Fan's Run All The Time
There are 2 things that will cause this to happen. 1. The thermostat needs to be replaced and, 2. The coolant sensor can be bad. When I had this problem, I changed them both at the same time, she been just fine since then. Also, I had the check engine light on, and got the code from AutoZone (it's free!)
Posted on Apr 15, 2009
You need to replace your crankshaft position sensor located by the harmonic balacer. These sensors heat up and cut off the engine until the sensor cools down. This happens with age and it is not specific to GM.
Posted on Jun 15, 2009
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