1995 GMC Jimmy engine missing

1995 GMC JIMMY
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JASON9591
  • MEMBER
  • 19 POSTS
1995 GMC Jimmy 6 cyl Four Wheel Drive Automatic
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when i hit the gas pedal it has a miss fire and rpm guage bounces up and down goes crazy and than backfires at high rpm. almost sounds like egr valve is open at idle. the rpm gauge is still going crazy at idle but engine lite does not come on and has good fuel pressure 63psi the plugs, wires, cap, rotor ,coil, ingition module, tps sensor , and cam sensor are all new any ideas
Apr 29, 2008 at 7:20 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Inspect and test the idle air control valve and the throttle position sensor. also the IAT and MAP sensor-
Apr 29, 2008 at 7:27 AM
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JASON9591
  • MEMBER
  • 19 POSTS
fixed problem ended up being the wire harness going to crankshaft sensor thanks for your help
Apr 29, 2008 at 1:30 PM
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BLUETORCH106
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  • 1 POST
Have the same problem with my SUV. I cant find the harness or the pins to fix it right. Tried to splice and soldier the wires but it doesnt work. Where did you find the harness at? I tried all local junk yards
Jun 17, 2008 at 7:54 PM
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JASON9591
  • MEMBER
  • 19 POSTS
i payed $20 for mine from the chevy dealer brand new



[quote:2f553cf29c="bluetorch106"]Have the same problem with my SUV. I cant find the harness or the pins to fix it right. Tried to splice and soldier the wires but it doesnt work. Where did you find the harness at? I tried all local junk yards[/quote:2f553cf29c]
Jun 18, 2008 at 12:22 PM
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