1985 Chevy Corvette code 54 / low voltage in fuel pump circ

Tiny
JENCHEN2652
  • MEMBER
  • 1985 CHEVROLET CORVETTE
  • V8
  • 2WD
  • AUTOMATIC
  • 167,000 MILES
Engine starves after reaching operating temp. Replaced fuel pump, fuel pump relay, checked and cleaned everything I could see at least. Something shuts the relay off at around 200 degrees. HELP

signed Frusteration. Lol
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Thursday, January 14th, 2010 AT 5:16 PM

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Tiny
RACEFAN966
  • CERTIFIED MECHANIC
Have you checked the oil pressure switch. This can turn off the fuel pump if it sees low pressure.
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Friday, January 15th, 2010 AT 10:45 AM
Tiny
JENCHEN2652
  • MEMBER
The gauge shows good pressure, and temp. So I hadn't thought of the switch. Is that a good or bad only switch? I was thinking of injectors but hopeing for a simpler salution before that. Ill check the switch first tho. Thank you
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Friday, January 15th, 2010 AT 4:09 PM
Tiny
RACEFAN966
  • CERTIFIED MECHANIC
Ok check the red wire coming from the oil pressure switch this is the one that goes to the fuel pump relay to shut it off. Run the car up to temp and then check that wire for power once it dies. Let me know what you find.
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Saturday, January 16th, 2010 AT 8:42 AM

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