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Fuel Pump dying, how long to live???

dburgjohn

Well-known member
Joined
Jan 2, 2003
Messages
221
Location
Dyersburg TN
Corvette
1992 Coupe
The check valve in my fuel pump is going bad (will not hold presure after car shut off). The pump seems to be holding pressure while running. How long do I have before the pump dies?
 
Replace it. It's easy, not that expensive and you can save your starter.
 
Fuel Pump

Yep, replace it only about $60.00 and 30-45 minute job.
 
Just paid $65 for a pump and filter screen from AutoZone. Pump itself was under $60. Not a name brand, but I don't expect this to be the permanent pump anyway.

Really wish I could figure out how to use this Accel pump, but it looks to be set up more for inline than in-tank and won't be easy to convert (unless someone makes a kit, which I haven't been able to find).

[RICHR]
 
$60.00 Fuel Pump

Bought one at Pep Boys Last year for $60.00. Don't go to the dealer for this one. Even Ecklers is much cheaper. Mine works just fine, and unless your high performance these produce enough pressure. If you want the Bosch, they go for around $90.00-100.

Ecklers has pumps for $52 for an 84 and $83 for 85-87, 92 is a little higher, but would still check around first, there are deals out there. Even if it is $100. for a 92, it's worth not getting stranded!!
 
Do you know you don't have a leaking injector?
Most of the orginal pumps will last at least 100k miles.
I let the one in my 87 die on me it lasted 215K miles.
When it quit I got about 3 miles notice, a little sputtering.
When I ripped it apart it had worn the communtator down until one of the segments ripped out and that was the end of it.
It comes out from the gas door. The toughest part of the job is getting the rubber boot back in place on mine since it was 15 years old and all hardened up.
 
I have allready did leak down tests and confirmed that it is the pump. Just had several other things eat cash lately and did not know if I could let this ride a while.
 
Replacing fuel pump

Don't go to the dealer to have the pump replaced. A local dealer quoted me three hours shop rate ($85.00) to remove and replace the fuel sending unit/fuel pump. I did it myself in about thirty minutes. You need a torx driver to remove your gas filler cover. Then disconnect the three hoses and the electrical connector. Nine 3/8th ( if I remember correctly) inch bolts hold the assembly in place on top of the gas tank. After removing these, simply remove the entire unit.

Pop the filter off of the bottom of the fuel pump and disconnect the electrical connector on the side and the pump slips right out.
Reverse the process.

No special tools are required and you stand up to do it without any contortions. I would caution you not to force anything when removing the unit from the tank or putting it back in. It just requires a little turning to position it correctly... No force.
 
You can actually measure fuel pump characteristics (RPM and waveform) to tell how long it will last:

http://www.asashop.org/autoinc/july98/techtotech.htm

The tools (digital scope and current clamp) are expensive but a good shop should be able to do it for you in 5 minutes.

The online asa autoinc magazine has some great columns that go into detail on how good techs diagnose and fix root causes and not just treat symptoms. Most of the magazine is for shop owners, however.
 
I picked up a new AC Delco pump on ebay for about $50. My original pump only had 45k miles on it but was getting tired. Pressure was slow coming up. With the new pump the pressure is up to max. almost instantaneously after turning on the key.
 

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