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Rough idle after belt replacement

Old Dec 17, 2022 | 05:37 AM
  #1  
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2011 C 300 4matic Luxury
Rough idle after belt replacement

Hello all,

About a month ago my belt snapped. Apparently the pulley had seized and eventually the belt snapped. Had the tow truck take it to their shop which fortunately was right down the street from my house. Took them about 2 weeks to replace belt. Got it back but the check engine light came on. Took it back and they replaced a sensor. No more check engine light, however it's been idling very rough since. I haven't put my analyzer in to check for codes yet. What should my idle RPM's be? Any help would be appreciated.
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Old Dec 18, 2022 | 08:55 AM
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2017 GLE350 4MATIC
Codes will give you a hint as to the next step that is required. What is the maintenance history of this car? Time to roll up the sleeves and give her a good going-through?
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Old Dec 18, 2022 | 11:06 AM
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2011 C 300 4matic Luxury
I'll check to see if there are any codes later on today. Drove it for the first time after about 2 weeks and at first it was really rough but after driving awhile it wasn't as rough. Still not as smooth as it was though
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Old Dec 18, 2022 | 12:57 PM
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2017 GLE350 4MATIC
What is the maintenance history of this vehicle?

Is it time for spark plugs, ignition coils, engine oil/filter and engine air filter services?
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Old Dec 19, 2022 | 12:25 PM
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2011 C 300 4matic Luxury
Just bought it in September from a dealership. Purred like a kitten up until the belt was changed so I don't think it's the coils, oil or air filter. I'll check the filter today
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