98 jimmy cold starting

Asked by Dec 31, 2015 at 12:56 PM about the 1988 GMC Jimmy

Question type: Maintenance & Repair

my 98 jimmy won't start in cold weather also runs strangely when it does start. it is like someone is pushing throttle when driving first faster then slower a difference of about 4000 rpms up and down up and down constantly until at idle then idles fine and steady. can see a difference on the tack.

1 Answer

72,265

Sound like you have a vacuum leak. Take some carb cleaner and spray along the intake gasket, throttle body area, anywhere there is vacuum. If there is a leak the RPM's will pick up. Also it may be in the Air Idle Control sensor. That gets all gummed up and needs to be cleaned by taking it out, and also cleaning the port it goes into. You must make sure it seals when you put it back in as there is vacuum right there

1 of 1 people found this helpful.

Your Answer

Add photo

Related Questions

  • 98 jimmy cold starting 1 answer

    my 98 jimmy won't start in cold weather also runs strangely when it does start. it is like someone is pushing throttle when driving first faster then slower a difference of about 4000 rpms up and down...

    1988 GMC Jimmy

    -

    Maintenance & Repair

  • My 98 GMC Jimmy slt

    I am having an issue with my 98 Jimmy I replace the alternator because the battery light was on and my fuel light came on it wasn't the alternator and the lights are still on so we checked the pane...

    1998 GMC Jimmy 4 Dr SLT 4WD SUV

    -

    Maintenance & Repair

  • Will blazer rims fit my jimmy 3 answers

    I have a 98 jimmy 4x4 and was wondering if blazer 4x4 rims will fit it

    1998 GMC Jimmy 4 Dr SLT 4WD SUV

    -

    Maintenance & Repair

  • 99 Jimmy engine question 1 answer

    My Jimmy is acting up again... I can drive it for a while and it's all good then all of a sudden, if I yet to slow down, the rpms go up and the engine revs, truck tries to accelerate . Breaking i...

    1999 GMC Jimmy 4 Dr SLT 4WD SUV

    -

    Maintenance & Repair

  • knock on 1998 gmc jimmy 2 answers

    I have a 1998 gmc jimmy when i start it it makes a knocking sou d by the passenger side any idea what could it be?

    1998 GMC Jimmy

    -

    Maintenance & Repair

Search GMC Jimmy Questions

GMC Jimmy Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 280
#2 tennisshoes
tennisshoes
Reputation 260
#3 1oldman
1oldman
Reputation 240
View All

Related Models For Sale

Used Chevrolet Blazer
1,168 listings starting at $1,495
Used GMC Sierra 1500
772 Great Deals out of 68,508 listings starting at $1,800
Used Chevrolet S-10
7 Great Deals out of 1,334 listings starting at $1,999
Used Toyota 4Runner
227 Great Deals out of 19,354 listings starting at $1,500
Used Jeep Wrangler
264 Great Deals out of 15,848 listings starting at $3,200
Used Chevrolet Suburban
280 Great Deals out of 19,272 listings starting at $1,999
Used Ford Bronco
197 listings

Used Cars For Sale

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.