1994 GMC Jimmy Starting Problems

Tiny
EDNY
  • MEMBER
  • 1994 GMC JIMMY
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 115,000 MILES
Jimmy won't start after a few tries, but then after a few hours being parked, it starts. Very frustrating! We added 5oz of Lucas fuel treatment, then we added 5 gallons of gas. But still doing the same thing. It starts then later it won't start. What could be the problem? Fule filter?
Thursday, June 3rd, 2010 AT 12:10 PM

1 Reply

Tiny
INTERNETMECHANIC
  • MECHANIC
  • 700 POSTS
When the problem occurs, have a helper crank it while you visually check for spark at the plugs. You can take a spark plug wire loose, use known good plug or spark tester in the boot. Ground metal part of plug/tester to metal part of engine, engine cranking, watch for spark. If you have spark everywhere 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. Are there any applicable trouble codes?
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Thursday, June 3rd, 2010 AT 1:04 PM

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