4TH REPLACED FUEL PUMP WON'T COME ON

  • Tiny
  • Farmer's Daughter
  • 1999 Buick Century
  • 6 CYL
  • 2WD
  • automatic
  • 150,000 miles

1999 Buick Century Custom V-6 3.1 Litre 2 Wheel Drive ---
fuel pump measuring only about 5 volts and not coming on. Any suggestions, please?

Sunday, January 9th, 2011 AT 12:30 AM

2 Answers

  • Tiny
  • Wrenchtech
  • Expert
  • 19,812 posts

The fuel pump relay has a "prime" terminal coming off it. You can apply 12v to it to see if that gets you 12v at the pump. That will isolate the bad part of the circuit.

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Sunday, January 9th, 2011 AT 1:10 AM
  • Tiny
  • rasmataz
  • Member

Check and test the fuel pump relay, the computer control of the FP relay circuit and the fuel pump and oil pressure sending unit-

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Sunday, January 9th, 2011 AT 1:12 AM

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