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Old August 5th, 2012, 12:17 PM   #1
southofsanity
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Default 2000 buick 3.8 ?

it ran a week ago now it wont start rolls over ,spark but fuel pump doesn't turn on but if i jump the comp.the pump works and also my check engine light doesn't even come on with the key in the first postion.does this mean comp. is fawked any help would be appreciated haven't wheeled all summer and buggy is pretty much done just won't start now
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Old August 5th, 2012, 01:03 PM   #2
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Good possibility that it is...a little more info might help though. year make and model.

Never mind on year and make, I just noticed its both posted.
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Old August 5th, 2012, 01:35 PM   #3
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i ran into this issue on a cavalier a few months ago. check your ground wires from the computer first. make sure the computer is getting power where it should. if those 2 things check out then good possibility the computer went bad.
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Old August 5th, 2012, 01:48 PM   #4
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Look into a fuel pump high/low resistor.. It should be on the passenger side, fender well, under washer resivoure (sp). It's a real bitch to get to. Looks like a bar of soap with two wires sticking out of it. That's my bet.
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Old August 5th, 2012, 01:50 PM   #5
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What's a comp.? Computer? How do you jump the computer? Are you possibly talking about the fuel pump relay? If you are checking the relay, make sure you have power at two places on the relay. One will be for the computer control, the other will be fuse pump power. Computer controls the relay vio gound. You should get an active ground on the computer side of the relay for about 3 seconds after you turn the key on. It will then reground when it sees oil pressure and/or tach reference
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Old August 5th, 2012, 09:35 PM   #6
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got it it was a wire off behind the fuse thanks
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Old August 5th, 2012, 09:43 PM   #7
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Quote:
Originally Posted by MonkeyBiz View Post
Look into a fuel pump high/low resistor.. It should be on the passenger side, fender well, under washer resivoure (sp). It's a real bitch to get to. Looks like a bar of soap with two wires sticking out of it. That's my bet.
That is only on the super charged 3800's not on the na 3800's.
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