99 grand prix 3800 stalls wont re start

i have a 99 grand prix with 100000 miles and a 3800 engine non sc it starts fine cold and runs for about 10 min then skips and quits . it will start if you hold the thrtel down but skips and runs like crap will not idel at all and some times will not start at all fuel pressure is about 50 psi .and new moduale installed. any help would be apreciated Thanks:banghead:

What new module was installed? Any SES light?

Since fuel appears to be good an ignition related problem is a possibility. Spark plugs and ignition wires.

Also, try cleaning the throttle body with carb or throttle body spray cleaner. Be sure to remove and clean the IAC valve spring loaded pintle and the seat where IAC mounts on the throttle body.

Other suggestion is to remove the electrical connector to the MAF sensor and see if it will idle properly.