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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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