Pontiac Problems? Ask a Mechanic for Answers ASAP
I am sorry that you have not been helped yet. I just came online and saw your question
when it stalls out, does it restart easily?
When the idle drops low, does it go up and down, or just drop down to low idle?
Is the check engine light on?
Just based upon the initial information, I suspect either the throttle body throat plate is sticking or the electronic throttle body TP sensor is faulty, but would like to have the additional information to firm up the diagnosis
Ok, I need the engine size - 2.4, 3.5, 3.6, or 3.9L engine. If not sure, just post the 8th digit of the vin number. I want to see if there is a idle relearn procedure for it
Ok, here is the idle learn procedure without a scan tool
Disconnect battery for 10 minutes, then reconnect.
Start and idle the engine in Park for 3 minutes.
The ECM will start to learn the new idle cells and Desired RPM should start to decrease.
Ignition OFF for 60 seconds.
After the 3 minute run time the engine should be idling normal. ◊If the engine idle speed has not been learned the vehicle will need to be driven at speeds above 70 km/h (44 mph) with several decelerations and extended idles. After the drive cycle, the engine should be idling normally. ◊If the engine idle speed has not been learned, turn OFF the ignition for 60 seconds and repeat
Very possible as the computer can lose the idle parameters and since this happened at the same, then we at least need to start with the idle learn procedure and go from there. If it is still an issue, then we will go from that point in checking other things, but we need to do this first
It is around midnight where I am at and getting ready to go to bed. Do the learn procedure and then test drive. If still doing the same thing, let me know and we will go from that point.
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