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1993 GMC Jimmy fuel pump

Tiny
POWDER HOUSE
  • MEMBER
  • 1993 GMC JIMMY
Other Category problem
1993 GMC Jimmy V6 Four Wheel Drive Automatic 150000 miles

I have repaced three fuel pump within a year and now this pump is not running. Am I getting the wrong pump or do I have a bad wire somewhere? How can I find the problem? Please help!
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Saturday, December 8th, 2007 AT 2:57 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Get the repair manual see below-Lets start by finding the fuel pump relay and fuel pump/oil pressure sending unit tested.

This is how things goes-The computer energizes the relay for 2 secs for an initial build up pressure when vehicle fires up the fuel pump/oil pressure sending unit powers up the pump from there on.

See the circuitry below


https://www.2carpros.com/forum/automotive_pictures/12900_oil_sending_unit_and_fuel_pump_circuit_21.gif

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Saturday, December 8th, 2007 AT 3:13 PM

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