1993 Chevy Cheyenne Possible oil pressure switch trouble?

RHVACR

MEMBER
1993 CHEVROLET CHEYENNE
V8
2WD
AUTOMATIC
180,000 MILES

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

Monday, August 2nd, 2010 AT 7:30 PM

1 Reply

JDL

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.

Was this

answer

helpful?

Yes

No

Tuesday, August 3rd, 2010 AT 11:03 AM