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Discussion Starter · #1 · (Edited)
I have posted this before, and took the advice, but it still stalls going down the road and now when you take the key out the factory alarm goes off. What else could it be? Is there a way to disable the anti theft system and would that make a difference?
 

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I had the same issue with a 2001 Grand Prix. One of the keys wasn't programmed right and when I would use that key the car thought I was trying to steal it. Had to have the key reprogrammed.
 

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Discussion Starter · #4 ·
Alarm & more info

The alarm issue was an issue with the key fob. It's all fixed. Plenty of spark, only does it when the car is at normal operating temp.
 

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The crank position sensor, and less likely, the cam position sensor may fail when hot.

If you have to wait until the car cools down -15-20 minutes, and then you get a re-start, one of those sensors could be at fault.

Best of Luck
 

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What Gtx said. I've had both the crank and cam position sensors go bad on these engines, and they won't throw a code when they start going bad, usually only when hot. The cam is the easiest to replace.
 

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Another thing I've run across with cam sensors is the magnet on the cam shaft gear has been known to fail or fall off. The body of the cam sensor on the cam shaft drive gear has been known to come apart leaving the plastic body in place without the magnet! This will cause issues that might be related to your issue. On another note, I have on a few occasions used an EPOXY CEMENT to hold the cam gear magnet in place. The plastic body for the magnet can come apart at which point you loose the cam sensor signal. So. you may want to remove the sensor and slowly rotate the engine by hand til the cam gear magnet can be seen in the sensor hole. Then you should be able to see if all is in place as it should be. OR, the magnet may have fallen off completely. This will cause all sorts of no start or poor running.

Good luck Jake (mr goodwrench)
 
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