Odd problem with the 99 Bonneville SE - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-21-2011, 05:10 PM   #11
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We don't have a write up on changing a fuel pump on your year. You need to drop the fuel tank, then you can remove the old pump. It'* a simple mater of removing the retaining ring and lifting it out. Dropping the tank is a bit more of a pain.
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Old 09-21-2011, 07:50 PM   #12
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I have also seen where people have used an air chisel to cut a flap in the trunk pan. It looks horrible but in the end it is all covered up.
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Old 09-21-2011, 08:05 PM   #13
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Yes, a few have cut a hole, but you need to be real careful, there are fuel lines and wires right there. You could make a real mess in a hurry.
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Old 09-22-2011, 08:16 AM   #14
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i dont think its a good idea to cut the hole your self either, and when its done from the factory theres a good solid seal when you put it back together. if you get a good pump and take your time and do a good job you shouldnt have to get back into it again. and the problem is getting the tank back in down is easy.if yours still runs though try running the gas out of it before you start. every time ive had a pump go the car quit and i was fighting a full tank, not fun.
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Old 09-22-2011, 08:28 AM   #15
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I know I've posted how to do a fuel pump on 92-99 many times. My tank was out so many times I joked about it being velcro'd in.

Search on fuel pump and my user iD. There'* probably a billion posts to look through, there'* definately a write up though.

Big things to keep in mind.
The strap bolts are going to spin freely as the tinfoil setup they used to hold them isn't ideal. You'll cut the straps and should automatically have a set on hand.

Spray the plastic connectors out near the fuel filter. Those coming off are key and some penetrating oil (not WD) works good to lube them for seperation.

The exhaust doesn't have to come down. It'* helpful, but not needed. Just slide the tank out the driverside.
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Old 09-26-2011, 04:50 PM   #16
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Thanks guys! I got it done perfectly and it was a real bitch! Everything is connected perfectly, wires and lines, however, the pump will the pump fuel. I have no idea what to do now... relay?
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Old 09-26-2011, 04:55 PM   #17
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I got it all done correctly: the new pump, connections, and fuel lines. However, the pump is not pumping any fuel and I do not know why? I followed instructions perfectly. Could it be the relay?
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Old 09-26-2011, 05:00 PM   #18
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Check for voltage. Could be the fuse, relay, the plug, or even a bad fuel pump.
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Old 09-26-2011, 05:03 PM   #19
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ya the plugs are common, i had to cut it out and solder the wires on my father-inlaws bonnie
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