rough idle

2001 MERCEDES BENZ ML320
139,000 MILES
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DAVID CARLSON
  • MEMBER
  • 1 POST
My ml320 is idling progressively rougher. Possible Idle control valve or vacuum leak somewhere?
Mar 26, 2012 at 9:15 PM
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DRCRANKNWRENCH
  • ✓Experienced 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
Mar 26, 2012 at 9:39 PM
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