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New fuel pump stops running after 10 min

Tiny
PATBUSGUY
  • MEMBER
  • 2000 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 98,000 MILES
Car runs ok cold. New fuel pump stops running after 10 min. Pump relay looses signal to stay closed. How can I test pump resistor. That is, what range of resistance should my ohm meter show? What else can shut off control circuit to fuel pump? Thanks, Jim
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Saturday, September 19th, 2009 AT 9:57 PM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
Many GM cars have a backup oil pressure circuit for the fuel pump, that is, if FP relay goes bad, once oil pressure is above 10psi, the oil pressure circuit will run pump.
Conversley, if OP circuit is bad (low pressure) pump will shut off.
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Saturday, March 20th, 2021 AT 7:31 PM

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