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1994 GMC Jimmy FUEL PRESSURE

Tiny
WHITEXD09
  • MEMBER
  • 1994 GMC JIMMY
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 198,000 MILES
WHEN I TRY TO START MY JIMMY IT WONT START.I HAVE REPLACED THE CAP AND ROTOR BUTTON. IT HAS FIRE. IT WILL START WITHA BURST OF ETHER AND RUN FOR HOURS. BUT IT WONT START ON ITS OWN.I CHECKED THE FUEL PRESSURE WITH THE KEY ON(42 PSI) AND STARTING(32 PSI). THE VEHICLE HAS NO TROUBLE CODES. THIS ALL STARTED ABOUT 8 WEEKS AGO WHEN I PRESSURE WASHED IT. WILL THE OIL PRESSURE SWITCH KEEP IT FROM STARTING?ANY HELP WOULD BE APPRECIATED.
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Monday, August 17th, 2009 AT 8:45 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
4.3 Liter engine 6 cyl -The fuel pressure should be 55-61psi yours is on the low side.
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Monday, August 17th, 2009 AT 8:49 PM
Tiny
WHITEXD09
  • MEMBER
  • 2 POSTS
Would the Oil pressure sensor keep the vehicle from running?
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Tuesday, August 18th, 2009 AT 10:07 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
When the key is turn to run position the fuel pump will run for 2secs to prime the system then stops- at cranking the oil pressure sending unit will power the fuel pump when the oil pressure is above 4 psi.
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Tuesday, August 18th, 2009 AT 1:18 PM

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