Rough idle

Tiny
DAVID CARLSON
  • MEMBER
  • 2001 MERCEDES BENZ ML320
  • 139,000 MILES
My ml320 is idling progressively rougher. Possible Idle control valve or vacuum leak somewhere?
Tuesday, March 27th, 2012 AT 4:15 AM

1 Reply

Tiny
DRCRANKNWRENCH
  • MECHANIC
  • 3,380 POSTS
It could be either of those issues you mentioned. Since you are on the right track I think it best that you use our diagnostic walk through for this. Just follow the link below;

https://www.2carpros.com/articles/engine-misfires-or-runs-rough
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Tuesday, March 27th, 2012 AT 4:39 AM

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