1999 sonoma 4.3 auto stumbling during acceleration/keeping speed

Devan K Taylor
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?  

3 Answers

Brandon Damm
15

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

Mike Chin
485

has the catalytic converter been checked?

Devan K Taylor
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.

Your Answer

Add photo

Related Questions

Sonoma
Looking for a Used Sonoma in your area?
CarGurus has 617 nationwide Sonoma listings starting at $1,981.
ZIP:

Search GMC Sonoma Questions

GMC Sonoma Experts

#1 Mike Bonnell
Mike Bonnell
Reputation 290
#2 parkle
parkle
Reputation 260
#3 James Mayfield
James Mayfield
Reputation 210
View All

Related Models For Sale

Used Chevrolet S-10"
53 Great Deals out of 1,838 listings starting at $1,200
Used Ford Ranger"
374 Great Deals out of 6,784 listings starting at $995
Used Dodge Dakota"
182 Great Deals out of 4,251 listings starting at $2,150
Used Chevrolet Silverado 1500"
2,518 Great Deals out of 170,475 listings starting at $650
Used Toyota Tacoma"
703 Great Deals out of 24,308 listings starting at $2,495
Used Nissan Frontier"
365 Great Deals out of 21,690 listings starting at $2,750
Used Ford F-150"
2,994 Great Deals out of 151,632 listings starting at $1,000
Used GMC Sierra 1500"
986 Great Deals out of 57,400 listings starting at $1,995
Used Dodge Ram Pickup 1500"
812 Great Deals out of 14,487 listings starting at $1,495
Used GMC Jimmy"
13 Great Deals out of 452 listings starting at $1,900

Used Cars For Sale

2003 GMC Sonoma For Sale
9 Great Deals out of 140 listings starting at $2,990
2002 GMC Sonoma For Sale
6 Great Deals out of 115 listings starting at $2,998
2001 GMC Sonoma For Sale
4 Great Deals out of 70 listings starting at $1,981
2000 GMC Sonoma For Sale
82 listings starting at $2,150
1999 GMC Sonoma For Sale
3 Great Deals out of 44 listings starting at $2,700