2006 pontiac Grand Prix 150kmiles v6 , Bought car used it broke down next day. Water pump ,plugs ,coils, wires, and head were replaced . Started and ran fine after the work let it run a hour didnt over heat, next am wont start. Has 60 lbs of fuel pressure at the rail and and can hear the pump hum . seems to be sparking as it runs on starting fluid . No service light and no codes on the 30$ reader.
i watched all the videos he had up bfore i found the sit to ask the question , thank you for the links
Possibly clogged injectors. Clean or replace.
If its a 3800, it may me the ICM. They sit over the exhaust manifold on the front left when looking under the hood. Theyre prone to failure over time do to the heat. Usually those symptoms unexplained random misfire.
ill check it out t.y
You are welcome. I hope it helps.