Question about 1997 Pontiac Grand Prix
Car seems to run normally until i take for off the gas pedal. then it dies. but starts rite back up and runs till i take foot off of the gas pedal. I started to hold the gas pedal down very slightly when stopping so car wont die.
Throttle body or idle control valve, with both of these faults you can normally get away with cleaning them.
Posted on Mar 19, 2014
Probably a good idea to get the computer scanned for fault codes. Your local parts store will check it for free. If nothing comes of that I would start by checking the intake for obstructions and cleaning the throttle body by removing it and thoroughly cleaning it with brake cleaner. Be careful not to damage the sensors. You may need to remove them prior to using chemicals on the throttle body. Beside that does the engine smoke? If so you may have a valvetrain or piston ring issue in which case a rebuild is most likely in order.
Posted on Jul 19, 2014
Check or get checked the idle speed control valve. hope this helps
Posted on Feb 18, 2012
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Posted on Jan 02, 2017
before you spend anymore have it hooked up to a real time engine analyser like a bdm pro, or a snapon scanner, take it for a drive and snapshoot scanner when the problem arises, could be a sensor like tps or an actuator, but will not register a code, just a flag
Posted on May 27, 2010
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Oct 27, 2012 | Cars & Trucks
The engine and transmission in this cars drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL THE DIAGNOSIS & TESTING IS COMPLETED.
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