Last post on Aug 04, 2012 at 8:43 AM
You are in the GMC Jimmy
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GMC Jimmy, SUV
#70 of 79 99 jimmy wont start
Aug 15, 2010 (7:29 am)
l had the intake gasket replaced. The mechanic reported a "bad miss". He played with the distributer until the truck backfired. "it sounded like a shotgun !" since the "boom" there is no action. You turn the key ,the dash lights up,but that's it. No fuel pump winding,motor turning,ect. The mechanic thinks the security system. I say the "boom" shot the computer. Could anyone please offer a solution !!! p.s. the machanic works under a shade tree.
#71 of 79 Re: Repeated MisFire 2000 GMC Jimmy [rhickson]
Aug 16, 2010 (8:14 am)
Replaced my after mkt cap & rotor w/GM on Sat and let car sit until Monday. Typically I got bad missfire for 10 minutes. Purred like a kitten, thanks for your help.
#72 of 79 Re: Repeated MisFire 2000 GMC Jimmy [saxmandon]
Aug 16, 2010 (3:22 pm)
You're very welcome....it was a pleasure....I wish you the best
Feb 22, 2011 (1:01 pm)
I have a 2000 Jimmy 4WD with only 90,000 miles on it, just had a new motor put in it .drove it for two days and it was just fine then the check engine light came on and it started cutting out and backfiring at around 1500 RPM's took it to the auto shop and they said it was the cam sensor replaced it and it is still doing the same thing but the check engine is not on.
ANY IDEAS? PLEASE HELP!!
#74 of 79 2000 jimmy backfiring
Feb 28, 2011 (5:10 pm)
I just replaced the head and intake manifold gaskets on my 2000 jimmy 4.3 vortec I have everything put back together and engine for the most part will idle pretty well with an occasional backfire, but once it goes into gear that is when it really happens I'm just about to my wits end, and I really need to get this thing going. I haven't changed the rotor cap or wires yet, I'm doing the work for a friend and am trying to save him a little money. Please any suggestions will help at this point.
#75 of 79 Re: 2000 jimmy backfiring [jayrob0311]
Feb 28, 2011 (8:51 pm)
I replaced a motor and transmission (1996) with a 2000 engine. I had to eventually replace the manifold gasket as well as fuel pump as it was giving a low reading. It still acted up so I had the intakes cleaned. None of this helped. The long and short of it was that I needed a better distributor cap, better wires and a rotor. Its been fine since then.
#76 of 79 Re: 2000 Jimmy [twarner1]
Feb 28, 2011 (8:55 pm)
My problems were resolved after I changed the fuel pump, changed the manifold gasket, had the intakes cleaned then replaced the wires, distributor and rotor with good replacements.
#77 of 79 Re: 2000 Jimmy wont accelerate [brammermj]
Jan 06, 2012 (11:31 am)
mine will back fire for a few seconds then runs fine what did you do to fix problem
Jun 02, 2012 (12:05 pm)
i was driving down the road about 35 mph and all of a sudden the motor started running very rough, any suugestions'? i got it going to put it in the garage and now i tried to start it again to move it back but seemed to kick backwards and didn't start. any idea's would be great. i am looking towards electrical, changed the fuel filter as i haven't done this in awhile but nothing else.
thank you much.
#79 of 79 2000 GMC Jimmy 4.3L Vortec jumped time
Aug 04, 2012 (8:43 am)
need some info, i've reset the timeing on my Jimmy 3 times already and it keeps jumping out of time. would the Camshaft Positioning Sensor or the Crankshaft Positioning Sensor be the cause of it jumping time? Any other information anyone has with this issue would be really appreciated. Thanks