2004 bonneville wont stay running

[dustin.g]

Hello all, new to the forum here and am hoping that someone could help me. I have an 04 bonneville sle with the 3.8. i had trouble getting the car to start and keep it running. i have already changed the fuel pump, MAF sensor and crankshaft position sensor. checked plugs and wires and no loss of spark. checked all body grounds that i could find and they look fine. The car will start but after about 30 minutes of running it starts to sputter like is running out of gas. i try to give it gas to keep running then the misfire doesnt get any better. any ideas? please help

 

[melsg5]

to do you have a check engine light on and if so what is the code? what is the fuel pressure reading?

 

[dustin.g]

no check engine light and fuel pressure is about 38

 

[melsg5]

guess only, could be coil packs fail when hot, do you still have spark when it stalls ? you have checked the coil packs and no signs of corrosion?

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[dustin.g]

replaced coil packs and still bogs out. but it didnt wait until it was warmed up this time.

 

[dustin.g]

Also after i replaced them and went to start the car it didnt start right away. had to crank a couple times

 

[melsg5]

try going through these articles for your engine, they list lots of things you can test
http://easyautodiagnostics.com/gm/3.8L/index-of-articles-1

Without a advanced scan tool, tech II, you are only going to be quessing as to the issue.