i have a 99 jimmy 4.3 vortec. starts, idles great and drives awesum until you step heavy on the gas peddle. then it dies down and sputters. let off and it smooths back out. any suggestions?

Asked by Nov 11, 2015 at 11:37 PM

Question type: Maintenance & Repair

2 Answers


I would check your catalytic converter. It may be partially plugged up.

1 of 1 people found this helpful.

could be the coverter or maybe the fuel filter could be plugged

Your Answer

Add photo

Related Questions


Search Maintenance & Repair Questions

Maintenance & Repair Experts

#1 Tom Demyan
Tom Demyan
Reputation 171,980
#2 dandyoun
Reputation 92,600
#3 tenspeed
Reputation 74,740
View All

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.