Should I replace the fuel pump? - 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 06-23-2004, 01:10 AM   #1
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Default Should I replace the fuel pump?

My car stalls on hard stops when the gas tank is less than 1/2 full. I'm thinking of dropping the gas tank and replacing the strainer.

Any reason not to replace the fuel pump too while I'm at it? It works fine now but it'* 11 years old. And yes I have run it down below 1/4 tank quite a bit.

Jeremy
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Old 06-23-2004, 02:32 AM   #2
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That'* tempting.......if it'* in the budget, sure, but don't use a wrecker part. And keep the old pump as a backup. This is one smelly job you don't want to do twice.
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Old 06-23-2004, 02:44 AM   #3
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Bill you are a posting machine!

A new pump can certainly be worked into the budget... see my last post re: 7 months severance pay. You're right, I definitely don't want to do this job twice!

Jeremy
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Old 06-23-2004, 10:22 AM   #4
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I would do it. I just replaced mine because the car has 120k on it now and I wasn't sure if it was the original pump or not. Just a little extra insurance I guess. Of course, a new pump could die just as easily I suppose, but the odds are lower
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Old 06-23-2004, 02:29 PM   #5
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Default tank

Check your gas cap if it is venting properly.
There should be no difference in pump performance between 1/2 and full tank
as the filter sock is at the bottom and totally submerged.
Have you checked pressure at the fuel rail? Changed the filter?
Adding mystery oil to the tank will dissolve any rust and sediment in the filter
sock and lubricate the pump.
Water in the fuel could also cause this.
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Old 06-23-2004, 09:09 PM   #6
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Car did the same thing when my pump was getting bad. Go ahead and change it out while you still can.. and dont get stranded like I did.
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Old 06-23-2004, 11:37 PM   #7
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Default Re: tank

Quote:
Originally Posted by SSEBONNE4EVA
Check your gas cap if it is venting properly.
There should be no difference in pump performance between 1/2 and full tank
as the filter sock is at the bottom and totally submerged.
Have you checked pressure at the fuel rail? Changed the filter?
Adding mystery oil to the tank will dissolve any rust and sediment in the filter
sock and lubricate the pump.
Water in the fuel could also cause this.
I didn't think emissions-controlled cars had vented gas caps. I lost my original cap... I bought the current cap at a gas station about 4 years ago.

With 1/2 tank of gas the strainer is usually submerged and works fine, but I suspect under heavy braking the gas is shifting around in the tank. I'm not familiar enough with the layout of a gas tank to know exactly what'* going on. But there is a TSB regarding this condition and the solution is to update to the newer strainer.

The problem has been happening since last summer. I changed the fuel filter last fall. I added a couple of cans of dry gas this winter. Problem persists.

Mystery oil is an interesting idea, what brand do you use? Marvels?

Jeremy
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Old 06-24-2004, 01:28 PM   #8
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Default Mystery oil

Yes its marvels. Its worth a try for a tank or so...
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Old 06-24-2004, 10:26 PM   #9
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maybe you'll get lucky and the fuel strainer just fell off, like mine did

http://www.bonnevilleclub.com/forum/...196&highlight=
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Old 06-25-2004, 07:29 PM   #10
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i have a brand new ac delco pump for sale if you need it...$75
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