2002 Pontiac Grand Prix stalls when slowing/starts-dies-sta

Okay, we are going to go down a bit of a backyard technique but it should flush out our offender.

Problems that only happen when hot take on a different kind of diagnosing. Getting it hot to the point of fialure, will give you time to lower the temperature of a part that is bad when hot.

You need to keep some cool water with you in a zip lock bad or similiar.( Some guys just pour the water). Three components that you need to cool off and restart the engine are the ignition Module, crank sensor or the
Computer. I would pour the water on the ignition module first then try to start it. If not go to the crank sensor. Lastly the computer. But I would keep water in the baggie and put it on to cool it. Or pull it and put it out side if it is cold out.

I did miss the restarts and runs fine part. When I said hot, I meant at operating temperature.

In lieu of this, I would get a fuel gauge hooked up and drive it until it stalls, monitoring the fuel pressure. What may be happening is the sock is plugging while it is sucking. When the stall happens the sucking stops and sediment drops off.

I would also check the throttle body for a carbon build up and clean the throttle bore with a good cleaner and plastic brush.

Another thing that can be happening is a bad MAF. TRy unplugging it and driving it to se if the symptoms change.