NEED HELP DETERMINING WHY MY FUEL PUMP KEEPS FAILING

  • Tiny
  • scottscott07
  • 1991 Nissan Pathfinder
  • 100,000 miles

My fuel pump keeps failing and i'm not sure y i'm currently removing the tank and cleaning it out to eliminate contaminated fuel as the problem but am now thinking its an electrical problem.

When I bought the vehicle the fuel pump was just replaced and after a month or so I had to replace it and the fuel pump housing because of a fried connection on the top(can provide picture if needed).

I am wondering if I have a bad wire harness but am not sure how to test that.

I was considering bypassing the harness completely but am not sure if that is possible I don't know if my pump requires less or more volts then the battery puts out.

Any help on this would be greatly appreciated.

Saturday, August 4th, 2012 AT 1:18 AM

4 Answers

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,502 posts

No bypassing.

The electrical issue is the reason for your failures. Resolve those issues with a new complete unit, not a build a pump, drop the tank have all the crap flushed out and you will have no worries

Roy

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Saturday, August 4th, 2012 AT 1:29 AM
  • Tiny
  • scottscott07
  • Member

Ok what unit are u talking about the wire harness or the fuel pump and housing.

Because I was told at the parts store that I cant buy a new fuel pump housing I had to find a used one and could only buy a fuel pump

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Saturday, August 4th, 2012 AT 1:36 AM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,502 posts

Go to the dealer. It will be more money but well worth it.

Used is a bad idea. Parts stores dont carry complete units.

Roy

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Saturday, August 4th, 2012 AT 2:08 AM
  • Tiny
  • scottscott07
  • Member

Ok ill try it thanks for the tip very much apreciated

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Saturday, August 4th, 2012 AT 2:49 AM

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