Rough start, engine missing when accelerating

2006 GMC ENVOY
170,000 MILES • V6 • 4WD • AUTOMATIC
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BEVERLY PERRY
  • MEMBER
  • 1 POST
A few weeks ago I was having an issue with rough start. That went away and was fine for about a week, today the rough start was back and it would miss on acceleration and when idling, after about 30 minutes of driving it smoothed out and ran fine.
Aug 5, 2019 at 1:54 PM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good afternoon,

How long since you had a basic tune up? That would be plugs and coils?

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Worn spark plugs could cause this issue.

Also, a failing fuel pump could cause this as well. I would have the fuel pressure tested to be sure it is working correctly.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Roy
May 17, 2021 at 5:35 PM
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