1993 Chevy Cheyenne Possible oil pressure switch trouble?

1993 CHEVROLET CHEYENNE
180,000 MILES • V8 • 2WD • AUTOMATIC
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RHVACR
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  • 1 POST
Engine starts and runs a few seconds and dies. I started it and gunned it and it ran as long as I gunned, then drove a bit. Killed it and back to running a few seconds. After warm, sometimes won't start. Sit a while and back to start and dies after a few seconds, New fuel pump, filter, coil. Oil Switch???? How do I test oil switch JR
Aug 2, 2010 at 12:30 PM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
If you think it is a fuel issue, use a gage and check fuel pressure. Some of the national brand auto stores used to loan out a fuel pressure gage, if you don't have one. As far as the oil pressure switch in the fuel pump circuit, that is a redundant power supply to the pump. As long as the fuel pump relay and circuits are functional, rpm signal present, engine cranking, the pump should run regardless of o/p switch. At the fuel pump connector, the gray wire is voltage for fuel pump motor. Any applicable trouble codes. You should be able to check mil codes, yourself.
Aug 3, 2010 at 4:03 AM
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