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 out of 1 people think this is helpful.

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

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