Question about GMC Jimmy

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I have a 1991 gmc jimmy with the 4.3 My dad gave it to me. He drove it everyday, had a bad plug wire. So he put a tune up on it and it has never started again!!!!!!!!!!!!!!! This car has been in the family for years and I just want to get it running so please anybody with any ideas????

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What you should do is make sure the plug wires got put back on the right plugs.Also,look for any wires that may have got knocked of the distributor,or a plug to the distributor that didn't get plugged back in.When you do find the problem you will likely find it will be a simple fix,it will be harder to find the problem than to fix it.

Posted on Sep 16, 2010

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1 Answer

Cylinder 3 misfiring on a 97 gmc jimmy 4wd. Did a tune up about 2 months ago (ignition, wires, coil, spark plugs), replaced fuel pump last week, used fuel injector cleaner, still no luck...any ideas?


go back and check all the plugs, wires and the total tune up. check your firing order, and timing. put a timing lite on the plug wires and if the plug is bad it will show with the light. lol.

Oct 05, 2015 | GMC Cars & Trucks

1 Answer

I have a 1991 GMC jimmy. Run fine until I pulled


sounds like the fuel pump is bad. check the fuel pressure with a gage is should be 35lbs. if it still won`t start now have someone try to start it while you hit the fuel tank bottom with something if it starts the pump is no good.

Sep 09, 2014 | 1991 GMC S-15 Jimmy

1 Answer

Miss fire on cylinder4


this code indicates a missfire problem on cylinder #4,,this could be a bad plug,wire,injector,igntion module for cylinder 4,compression problems.that need to be checked out.

Nov 08, 2011 | 2000 GMC Jimmy

1 Answer

IHAVE A 1991 JIMMY GMC I HAD TUNE IT UP PUT A NEW CAP AND ROTO PLUG AND WIRE AND CHANGE THE FUSE FILTER ALSO BUT IT KEEP CUP OFF WHEN I MAKE ACOMPLETE STOP AND WHE IAM RIDE WHAT COUL IT BE.


3 most common causes for your problem are:
  1. Bad EGR (Exhaust Gas Reciculation) valve - clogged EGR will cause engine to stutter or miss
  2. Bad MAF (Mass Air Flow) sensor - will also make an engine stutter when bad
  3. Bad TPS (Throttle Postition Sensor) regulates idle speed under multiple conditions.

Mar 22, 2011 | GMC Cars & Trucks

2 Answers

97 gmc jimmy service engine light flashes while running and idles rough


you probably have a miss fire, when it flash it tell you that you do have a problem and you need to get imediate attention.
more likely you have a bad plug, wire or coil

Mar 07, 2010 | 1997 GMC Jimmy

1 Answer

1991 4.3L GMC Jimmy S-15 will not start. Turns over, but does not start. Replace spark plugs and wires, ignition coil, module checked good. The plugs are gettin fire but not sending it to the motor?


You need 3 things.
Compression
Good hot blue spark to all plugs.
Good gasoline and proper fuel pressure. 13-13.5 lbs on your TBI
If you have all 3 then move on to injector pulse to both injectors.

Keep me posted and recheck your spark plug wire to make sure they are not crossed. firing order 1-2-3-4-5-6 cylinder # passenger side 1-3-5 front to back. cylinder # drivers side 2-4-6 front to back
distributor #1 is located at the 7 o"clock and rotates clock wise so next distributor post on the right working clock wise is #2. Good luck and hope this helps.

Jan 05, 2010 | 1991 GMC S-15 Jimmy

2 Answers

Before tune ran fine, after tune up started missing


WELL THE FIREING ORDER IS 1-5-3-6-2-4 #1 IS CLOSES TO CRANK SHAFT PULLY HOPE THIS HELPS

Aug 12, 2009 | 2000 GMC Jimmy

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