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Old 11-13-2005, 03:58 PM   #1
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Default What'* your take on rebuilt Fuel pumps? / 95 vs 96-99 pumps?

Friday when I picked my car up from the tranny shop I noticed before we turned the engine over, but with the engine on the fuel pump was very audible.
So I figure now with the new transmission, smaller pulley, and more modding this winter, along with the noisy pump I figure that should be my next project.

What is the general consensus on rebuilt factory pumps?


Also, I'm curious about the flow rate of the 92-95 L67 fuel pumps vs 96-99 flow rates.

I'm curious if the 96-99 flows more, and if it does should I adapt one from GMPD into my 95 SLE SC? Or should I just get the Walbro 255 LPH High Pressure pump?
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Old 11-14-2005, 09:28 AM   #2
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Tip..for you if you haven't done one of these tanks before. The nut on top of the bolt for the strap sits in a hole the rough shape of the nut. 1/4inch of bolt and dirt later that nut spins freely and you have to cut straps.

Order straps in advance and get some bolts to replace with. 2 inch bolts were a two person job. However 2 1/2 would work great.
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Old 11-16-2005, 12:03 AM   #3
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Or if you're good with a torch, cut the heads of the bolts off.

Also, a noisy pump doesn't always mean a failing pump.
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Old 11-16-2005, 12:18 AM   #4
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My straps on both cars are fine, and I think SonomaZR2'* are also.

Factory pumps, you have bass-ackwards. The 92-95 L67 pumps will outflow the S2 pumps. Go figure. Series 1 pumps are capable of supporting 400hp.

But you can buy a Walbro 255l/hr pump for the same price.

Rebuilt pumps are probably fine, as they replace all the guts. Buy the correct pump for your car, and don't try to fit a S2 pump that isn't designed to work with your FPR or injectors.
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Old 11-16-2005, 12:34 AM   #5
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Give the strap bolts a real good shot of WD-40, then go to work on the other tank connections. The bolt may be ready to come out by the time you get back to them.
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Old 11-16-2005, 08:51 AM   #6
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Quote:
Originally Posted by J Wikoff
Give the strap bolts a real good shot of WD-40, then go to work on the other tank connections. The bolt may be ready to come out by the time you get back to them.
PB Blaster is probably a better choice if they are rusty. First thing we did was jack car up. Second was spray all rusted bolts
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Old 11-22-2005, 06:19 PM   #7
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spray them a couple days before you do the job.
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