96 bonneville wont randomly starts - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 08-12-2009, 09:04 PM   #1
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Default 96 bonneville wont randomly starts

ok guys maybe yall can help me with this. My mom has a 96 with 194k it runs strong but it started cutting out and started getting hard to start after it had ran for a little while. Well i did a tune up on it ,plugs, wires,changed the fuel pump and filter also the iac well now it will start sometimes and run for a while then shut down and i noticed the fuel pump is not coming on when i turn the key over , but then sometines when i turn the key over you hear it come on and it runs fine for awhile. ive checked all the relays and there good also. i did notice it does not want to shift right when it is running. Ive sherched this for a few days and found some good stuff but not what i need. i dont understand why the fuel pump will come on one time then not the next!!! This thing is pissing me off i have an 9second cobra and i cant even fix my moms car lol. the only code it was showing was one for the gas cap. Any help would be helpfull!!
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Old 08-12-2009, 09:23 PM   #2
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Check the car over for vacuum leaks, this can throw the code you mentioned as well as cause running problems. Check over the battery cables, both of them on both ends. Clean them up and make sure they are tight.
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Old 08-12-2009, 09:32 PM   #3
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ive checked battery cables but i will check again, Come to think of it i pulled the fuel line off the filter to see if i could get fuel to come out and i got nothing but when i pluged the line back up and tried to start it it fired right up and ran for a while then started this grap again
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Old 08-12-2009, 09:38 PM   #4
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Can you check the fuel pressure? Your looking for about 45 PSI
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Old 08-12-2009, 09:44 PM   #5
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yes i can when i go back over there but right now there is no fuel pressure cause the pump is not coming on when i get it to come back on i can check it.The only reason i have not is my fitting on my gage is diffrent and i have not had time to get another one. But it has 0 pressure right now
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Old 08-12-2009, 09:48 PM   #6
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OK, does the pump turn on when you first turn the key, then shut off. Or does it not turn on at all?
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Old 08-12-2009, 09:49 PM   #7
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it does not turn on at all! Then later on it might lol
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Old 08-12-2009, 09:52 PM   #8
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If it'* turning on at all, even from time to time, the fuse it fine. That tells me the relay is flaky. One more thing, the title says 86 Bonnie, but your first message says 96. I assume this is a 96 we are talking about. If so, I can edit the title.
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Old 08-12-2009, 09:56 PM   #9
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yes please this is a 96. I switched the relays aroundand nothing changed , the ones behind the glove box. Whitch one is it to be exact and are there anymore relays or fuses i could check
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Old 08-12-2009, 10:03 PM   #10
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Check for any loose connections or corrosion. Somethings not letting the power threw.
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