Question about 1988 GMC Jimmy

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1988 GMC JIMMY HICCUPS

MY 1988 GMC JIMMY HICCUPS WHILE DRIVING WHEN IT GET HOT OUT SIDE. i REPALCED THE PLUGS, WIRES, FUEL PUMP IT DOES HAVE A HIGH IDLE BUT RUNS GREAT. i AM AFRAID IT IS GOING TO DIE.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1118 Answers

SOURCE: 1994 GMC Jimmy hard to start and runs rough when first started

did you do a fuel pressure test? if you havent do it its cheep an at least you can elimanate that. if thats not an issue, then there is only two other things crank sensor, and if there is one cam sensor.

Posted on Feb 02, 2009

  • 14 Answers

SOURCE: 1992 gmc chevy 350 wont idle when warm

This could be a number of things but i think that your problem sounds like a vacuum leak or an EGR problem. Try listening for leaks and try un-plugging the EGR solenoid valve one time.

Posted on Apr 17, 2009

haider_alhar
  • 90 Answers

SOURCE: 1994 GMC Jimmy hard to start and runs rough when first started

i think if you checked the sparking plugs and map sensors then check your distributer its maybe not delivering the current nedded to perform the spark to some of the cylinders

Posted on May 30, 2009

ourhowse
  • 2007 Answers

SOURCE: 1998 gmc 4x4 350 vortec ::: problem is when it

Change mass air flow sensor.

Posted on Jul 06, 2009

  • 603 Answers

SOURCE: while driving down the road my jimmy died, like it

Maybe timing belt broke?

Posted on Dec 14, 2009

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2 Answers

I have a 1996 GMC Jimmy that was iddling very rough and code said cylinder 2 misfire check engine light was on solid. Replaced all plugs, wires, cap and fuel filter 1st of March 2013. It ran better for a...


Lets start at the beginning. Did anyone check fuel pressure before and after replacing the pump ?
Has anyone checked the fuel pressure regulator and the injector spider ? The 4.3w engine uses a spider with one injector that supplies all 6 cylinders. And it runs at 65psi or more.

Aug 05, 2013 | 1996 GMC Jimmy

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I've got a 1994 GMC Jimmy 4.3 vortec v6. The truck


You may also want to check inline fuel filters they may need replacing

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2000 gmc jimmy 4x4 p0300. Replaced cap, rotor, wires, plugs, map sensor, checked icm. Nothing has helped


Just a thought,pull the dist.cap and make sure the rotor has
no side to side play ,thinking maybe a bad upper bushing in
the dist.Also,if the EGR valve has carbon and soot built up
on the piston it will make it idle really poor ,but run ok.
Might pull the EGR and clean it with intake cleaner.
Hope this helps.

Apr 12, 2013 | 2000 GMC Jimmy

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I have replaced my fuel pump, filter, throttle position sensor, and relay on my 1992 jimmy. it runs but everytime it hits idle speed it cuts off. what could that be


It should have an idle air control valve which lets air into the intake to control the idle speed. The valve could be faulty, or dirty, or the throttle body could be dirty. The computer opens and closes the valve to regulate idle speed.

Jul 16, 2012 | 1992 GMC Jimmy

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1996 gmc jimmy 4.3 v6 hard starting on cold starts runs rough for alittle while and sometimes has a high idle.


You should have your fuel pressure checked the problem is one of two things It is either your fuel pump or your fuel pressure regulator. It goes to high idle because it is starving for fuel.

Apr 26, 2011 | 1996 GMC Jimmy

1 Answer

When my 1996 Jimmy gets to a half a tank the gas gauge goes crazy and will go to empty then back to half. I acts like it is running out of gas. It also has a rough idle. What could be causing this...


The wire harness to the fuel pump sending unit may be going bad which is common to happen. The harness is around $15.00 and it runs from the frame to the top of the gas tank. The other thing to is the fuel pump sending unit may be going bad and the float in side that measures the amount of gas, has gone bad and the unit may need to be replaced. As for the rough idle, it cold be related to the fuel pump starting to go bad and the fuel pressure is just marginal to keeping the engine running. The fuel pressure during cold start should be 62-65 PSI and should drop about 5 PSI when the engine is running. The other thing to that would casue a rough idle, would be time for a tune up, "spark plugs, wires and distributor cap and rotor, fuel filter"

Feb 08, 2010 | 1996 GMC Jimmy

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My 95 jimmy sputters when taking off.


Plugs, wires, fuel filter, vacuum leaks

Jul 21, 2009 | 1995 GMC Jimmy

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1994 GMC Jimmy hard to start and runs rough when first started


i think if you checked the sparking plugs and map sensors then check your distributer its maybe not delivering the current nedded to perform the spark to some of the cylinders

May 30, 2009 | 1994 GMC Jimmy

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Replaced 305 engine with 350, runs poorly at steady speeds


try replaceing/testing knock sensor, unless you already did

Dec 01, 2008 | 1996 GMC Sierra

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