1999 Pontiac Grand Am Q&A

1999 Pontiac Grand Am Question: car won't stay running

what is the fuel pressure suppose to be -
Answer 1
aprox. 38- 42 psi -
Answer 2
If the car starts the fuel pump must be putting out some fuel pressure or pretty close to the pressure required, could you have a vacuum leak? Has the engine run rough recently or has the Check Engine Light/Service Engine Soon light come on? -
Comment 1
Hi Mr. Patrick, hey I have the same exact problem with my 99 grand marquis and yes my check engine light goes on/off every other week or so. First, the "box" that opens&closed when a/c is on&off would make a bangin noise when i turn the a/c on.After a got that "box" replaced, every time I stopped at a stop light I had to make sure I held the brakes because if not the car would jump like it was trying to drive itself. Turn the a/c off and it stops jumping. Now it does that jump thing every blue moon but getting it to stay crunk after it has sat for 5-6hrs. is my new big problem. I changed the mass air flow sensor but it didn't help. Can you? -
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