I thought I had this problem fixed but I guess not...
My 01 Catera's engine shuts down while driving. The first time it did it, the car sat for about an hour and then started right back up. I drove the car about 25 miles with no problems. Yesterday the car ran for about 20 minutes then shut down. I had the car towed to my house. When it arrived it started right back up again.
This morning I replaced the multifunction relay module because the car was exhibiting the Bose radio, trunk pop, and fuel door issue. After replacing the multifunction relay I drove the car straight to the mechanic... No trouble codes set.
I took the car out this afternoon and it ran for about 5 minutes then shut down again. The really odd and frustrating thing about this is if the car is left sitting for 20 minutes or so it starts right back up.
There is no bucking while driving, there is no warning... It just shuts off and no check engine light and worse, no trouble codes to give me a place to start looking.
My next guess is the cam position sensor but that somewhat doesn't make sense to me since the car normally starts up first try. If it is the cam position sensor, is it a bear to replace? The last cam sensor I replaced required a complete tear down of the front of the engine because it was located under the timing chain (GM 3800 series engine). Does anyone have any suggestions?