I have a 2000 Bonneville that won't stay running. The other day I was driving and while standing at a stop, it started bucking and died. I tried starting it, and it cranked and started, but ran rough and died a few seconds later. Then I was only able to get it running stepping on the gas. Once I let off the gas, it would die. I took it home and the next day it started and ran fine. I went to Autozone to purchase a fuel filter and when I came out it started rough and died. I pulled it home and changed the filter and checked the fuel pressure and all looked good, but it wouldn't stay running. I let it sit a few days, and then it ran fine again, but the problem came back. ANY SUGGESTIONS

Check it over for vacuum leaks.

well i had the same problem when i installed my new cold air intake, the computer had to change because of the change in air, it ran fine one day then 2 hours later cranked, then immediatley died, tried again same thing, tried again floored it, it came to life then took my foot off the gas and imediatley died, maby there is something wrong with ir mass air flow sensor, mine was changed and then ran like a champ again

and to add to what i said before, when my car wouldnt start the first time i called a tow truck and about an hour later they got there and the car started right up and i was pissed that nothing was wrong but i drive it to my mechanic anyway but alas i never made it, (about 90% which was about 3 minutes, roughly 2 miles total), of the way there it died at a stop light, and my mechanic ran down the road and forced the car to run again and drove it the last 10% of the way there, so yes it does come and go as quick as that, so i would check out ur air intake system and check your mass air flow sensor, and lemme know how it goes

To diagnose the maf, unplug it. Unplugged the car will run and start. The first couple times will be a little rough as it learns to idle etc and adjusts from working off the sensor to a premade table. It'll do it and get better as you drive though. If things are better that way, usually the sensor is bad and needs to be replaced.

Vacuum leaks can be found by using a can of throttle body or carb cleaner and spraying around the gasket areas. Any change in idle, spray that area again to find a consistency.

Thanks for all the advise. I will be working on the car this week and see what happens. I have a 95 olds 88 with a running 3.8 engine, if the parts match up, I will swap them. I will keep you updated with whatever I find out

Thanks

CEG

I believe that a bad TCC can cause this problem as well. if the clutch drags it will be too much of a stress on the engine and it will die. check for any pending codes in you PCM.

i had the same problem too but mine was the cam sensor get it at advanced its cheaper than napa or carquest