1999 sonoma 4.3 auto stumbling during acceleration/keeping speed

5

Asked by Devan K Aug 19, 2011 at 01:39 AM about the 1999 GMC Sonoma

Question type: Maintenance & Repair

my 99 sonoma seems to be stumbling when accelerating and will jump in revs when trying to keep speed at times.  i have recently changed the spark plugs, o2 sensor, fixed exhaust leak by downpipe, new plug wires and dist cap.  i know my driveshaft is out of alignment because it was checked over recently.  ordering a kit to level it out.  

any ideas on a fix for this problem?  

4 Answers

25

im not a mechanic but have u checked ur fuel filter. it just seems like uve checked everything else. and ur sure ur plugs, dist cap, and wires r all working? u might have a a spark plug wire not plug in the greatest to ur dist cap. check that to. and u might what to make sure ur dist cap is put on right. cuz one turn to far or not far enough would throw that whole thing off. make sure u check that to. id check that first

1,065

has the catalytic converter been checked?

1 people found this helpful.
5

I replaced the cat. Fuel filter was just replaced with last oil change last week. It is still jumping in revs a bit when it is in overdrive. I was told that there were problems with the valvebody of the transmission on these trucks that stop the torque converter from working properly. I will get it checked over by a transmission shop soon.

20

was that what was wrong wit hit? im having the same problem

2 people found this helpful.

Your Answer:

Sonoma

Looking for a Used Sonoma in your area?

CarGurus has 3 nationwide Sonoma listings starting at $5,911.

Postal Code:

GMC Sonoma Experts

  • #1
    parkle
    Reputation
    1,000
  • #2
    Mike Bonnell
    Reputation
    620
  • #3
    James Mayfield
    Reputation
    380
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet S-10
9 listings
Used GMC Sierra 1500
64 Great Deals out of 4,084 listings starting at $520
Used Ford Ranger
8 Great Deals out of 936 listings starting at $4,497
Used Chevrolet Silverado 1500
99 Great Deals out of 4,591 listings starting at $605
Used Ford F-150
109 Great Deals out of 8,350 listings starting at $3,970
Used Nissan Frontier
9 Great Deals out of 167 listings starting at $2,000
Used Toyota Tacoma
21 Great Deals out of 610 listings starting at $1,038
Used Dodge Dakota
40 listings starting at $5,994
Used GMC Jimmy
4 listings
Used Dodge RAM 1500
175 listings starting at $3,500
Used Chevrolet Blazer
572 listings starting at $29,981

Used Cars for Sale

2000 GMC Sonoma For Sale
1 listings starting at $5,911

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. Content will be removed if CarGurus becomes aware that it violates our policies.