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

75,445

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

GMC Jimmy Experts

  • #1
    Andrew Olsen
    Reputation
    310
  • #2
    1oldman
    Reputation
    270
  • #2
    tennisshoes
    Reputation
    270
View All

Related Models For Sale

Used Chevrolet Blazer
16 listings starting at $1,700
Used GMC Sierra 1500
234 Great Deals out of 9,940 listings starting at $399
Used Chevrolet S-10
12 listings starting at $3,495
Used Ford Bronco
2 listings
Used Chevrolet Camaro
836 listings starting at $12,610

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.