Question about 1998 GMC Jimmy

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1998 jimmy won't hold idle but will run like new

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You may have a dirty or faulty Idle Control Valve. If it is not throwing a code or a check engine light, I suspect that it may be dirty/

Posted on Feb 13, 2012

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Posted on Jan 02, 2017

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redds55
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SOURCE: 1993 GMC Jimmy won't throttle

Check fuel pressure regulator.Start engine hook fuel gauge to fuel line check pressure ready then pull the vacuum hose of the fuel regulator if pressure rises 5-10 psi then its good.

Posted on May 13, 2011

  • 1243 Answers

SOURCE: When I'm on the highway driving my 94 GMC Jimmy.,

have checked the play in the distributor shaft gear . excessive play can cause a timing problem for a moment. also has the service engine soon light came on with a code 42 for the ignition system. ignition control module can cause this concern also.

Posted on Jul 14, 2011

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My 1997 Jimmy runs fine in idle when I take off the vechile is fine until it reaches 20 mph it won't accelerate and the rpms increase up to 3000 but no speed. What's wrong it's a 4 wheel d


Sounds like 2nd gear in the transmission is slipping. Cars usually shift at 15-20 mph from first to 2nd. First check the trans fluid.

Mar 17, 2013 | 1997 GMC Jimmy

2 Answers

Where is the headlight relay in the 1998 jimmy? Low beams won't come onat night everything else does. high beams work


There is a headlight relay in the engine compartment fuse box, but its after the headlight switch and before the dimmer switch, so it powers both high and low beam circuits.
I would check the dimmer switch.

Dec 12, 2012 | 1998 GMC Jimmy

1 Answer

2000 gmc jimmy starts in AM fine won't start after sitting in sun all day


Can you jumper the fuel pump and make it start and continue to run ?
Have you checked to see if you are getting spark when it won't start ?
Could be a relay or coil, ignition module, or other component.

Aug 08, 2012 | 2000 GMC Jimmy

1 Answer

Car stalls after warm up, wont idle, surges from idle to highway speeds


Without knowing what car it is ...make. model and year this is a very vague question. A quick and dirty educated guess sounds like your timing has jumped ... if it's a timing belt, open the cover and check the timing marks ... or if it runs put on a timing light and look where the timing is ... sounds like it's firing after top dead center.

Nov 05, 2017 | 1990 GMC S-15 Jimmy

1 Answer

Engine turns over but wont start. 1997 gmc jimmy


Fuel Pump or starter. Since you say it's turning over but won't start I'd say it's your fuel pump. You'll probably have to drop your gas tank to fix this problem as your fuel pump is in the tank. You might be able to just loosen the straps and lower your tank a little to access it without removing the whole tank. Check around to local junk yards for this part and you'll probably find it for half the price as new. Make sure you can get your money back if the used pump doesn't work before you pay for it though. Don't forget to run fuel system cleaner (2 bottles to a full tank) once a month.

Oct 15, 2011 | 1997 GMC Jimmy

2 Answers

I have a 4WD 1998 GMC Jimmy 4.3L Vortec V6 and it started running hot then it shut off and wouldn't start back up... do you think there would be any way to fix without replacing the whole engine


IS THEIR WATER IN THE OIL? CHECK THE PLUGS TO SEE IF THEIR WET.YOU MIGHT PUT SOME PLUGS IN IT IF WET TO SEE IF IT WILL RUN.THEN PUT SOME HEADGASKETS ON IT.BUT IN REALITY NEW MOTOR WOULD BE BEST.

Aug 26, 2011 | 1998 GMC Jimmy

1 Answer

95 GMC Jimmy 4.3l W vin rough idle


My problem was solved when I repaired my 4 wd activation dash switch. The switch was contacting on 2WD & 4HI at the same time. The front differential activation is vacuum activated possibly creating a tug of war that didn't actually engage it but drained off vacuum from the engine? A theory at best but stumbbled across it because I knew the switch wasn't working properly I repaired it and low and behold rough idle disappeared and all is good for 3 weeks running.

Nov 17, 2008 | 1995 Chevrolet Blazer

1 Answer

TPS in a 1998 GMC Jimmy


the tps is ususally at the side of the throttle body opposite where the throttle cable / tv cable mount.
sometimes it won't start, run, or run erratically. there are ways of testing this unit (by output voltage) before you commit to buying a new one. to test it you will need a dvom (digital volt ohm meter).

just a note: straight from the book... "a broken or loose tps can cause intermitten burst of fuel from the injector and an unstable idle because the ecm thinks the throttle is moving."

Sep 22, 2008 | 1998 GMC Jimmy

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