what would cause a rough idle?

Asked by chargedbalt Jul 03, 2020 at 11:23 AM about the 2005 Chevrolet Cobalt SS Supercharged Coupe FWD

Question type: Maintenance & Repair

I've been chasing the same problem on my 05 ss
sc for about 6 months. the problem got worse
when I did some hp upgrades

2 Answers

39,760

Without knowing what you did to add extra HP, we wouldn't know how to help. Rough idling is usually an indication of a misfire or a vacuum leak. Is the Check engine light on?

18,185

I agree. Not enough info. Have you scanned it for trouble codes. That's usually a good place to start looking.

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