Question about 1999 Pontiac Grand Am GT
I have a 1999 grand am 4 cylinder. When I come to a complete stop the car wants to die out, sometimes it does, but other times I need to idal it. Could you help.
I had the same issue with my 99 GAGT, The following steps seems to have cured the problem
1. Get a Haynes manual and start checking sensors such as the Intake Air Temp (IAT) sensor. Throttle Position Sensor (TPS). And the Manifold Absolute Pressure (MAP) sensor for proper resistance. The manual lines these checks out step by step.
2. Next, carefully remove the Mass Airflow Sensor (MAF) and clean it with carburetor cleaner using EXTREME care not to disturb the very small wires on the engine side of MAF. I would hold the can about 6-10 inches from one side and spray it over a bucket or trash can. then spin it around and spray from the other side. When clean, it should be shiny silver (almost new looking).
When everything is put back together, it will likely run ragged for a day or two depending upon how much you drive. I'm thinking the computers have to recalibrate all the new inputs to create a baseline for performance. A temporary workaround at stoplights is to turn on the A/C. That kicks up the idle and should keep it from dying.
Good luck and hope this helps you!
Posted on Jul 09, 2008
Carseem to idle fine but when in gear seems to act like its fighting tostay alive. continuous gas pedal pumping keeps it running. Son drove carbefore problem and did not keep alot of gas in it always. I changed thefuel filter and plugs. Suspect it might be fuel pump but not sure donot have a gauge to test. If it is fuel pump, is that an easy thing tofix. would appreciate any advice on this. thanks
Posted on Jul 02, 2008
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