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1986 Pontiac Fiero Fuel pump not shutting off

Tiny
CHARLEYPRINCE
  • MEMBER
  • 1986 PONTIAC FIERO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 110,000 MILES
The fuel pump in my V6 Fiero won't shut off with the key turned off. I have to take the fuse out every time or the pump will run the battery down. I noticed you told someone to replace the relay switches, which I have already tried and it still won't shut off. Could it be the fuel pressure gauge, or the fuel pump itself?
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Saturday, August 16th, 2008 AT 1:53 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Lets try this disconnect the oil pressure sending unit and see what happens-if the OPSU is shorting out internally it will cause the fuel pump to run constantly


https://www.2carpros.com/forum/automotive_pictures/12900_oil_sending_unit_and_fuel_pump_circuit_69.gif

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Saturday, August 16th, 2008 AT 3:39 PM

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