Fuel pressure is low. Verify pressure is higher when vehicle will start and run and lower when it wont stay running. Then replace filter and check again, if still low replace pump. It takes more pressure to start it then keep it running, let me know if you have questions. Thanks.
Is the security/theft light on or flashing? Try to pull a spark plug and monitor spark when this happens.
Those sensors shouldnt cause the spark to be weak......Try to compare the way the spark looks from when it runs good to when it doesnt. Also use alternative fuel such as starting fluid to try and keep it running....If that helps then we know its a fuel related problem.
I'm really not sure.....I'll opt-out of this question and leave it open to other experts. Someone will reply automatically so dont reply otherwise question gets locked to me. thanks.
HelloCustomer I see you've been working with Dan. I have one thing to try. It happened to me twice with 3800 Impalas so it's worth a shot. Disconnect the Canister Purge solenoid and see if the problem goes away. It's mounted toward the front valve cover. Let me know if it makes any difference.
Your JA Expert,
Duane, here is it's location.
are you going to adandan me already , your a master tech , i have a driability problem,plea
se or kindly open the question back up as dan did respectfully duane . retired master tech my specialty was drivability but i have been out of the drivability loop for a while now.somethings shuting down and not allowing it not to idle. after it warms up ,