1994 GMC Jimmy FUEL PRESSURE

198,000 MILES • 6 CYL • 4WD • AUTOMATIC
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WHITEXD09
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  • 2 POSTS
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.
Aug 17, 2009 at 1:45 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
4.3 Liter engine 6 cyl -The fuel pressure should be 55-61psi yours is on the low side.
Aug 17, 2009 at 1:49 PM
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WHITEXD09
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  • 2 POSTS
would the Oil pressure sensor keep the vehicle from running?
Aug 18, 2009 at 3:07 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 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.
Aug 18, 2009 at 6:18 AM
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