Question about 1996 Mercedes-Benz C-Class
My car engine doesn't run smoothly in the morrning and miss fire. It was just serviced but the engine rev is fluctuating ups and down for 5 minutes
the gear is not changing as it supose to do and gear not changing quick enough.
Thank you for you advice and any information
This is definitely not a do it yourself job,take to shop,im a benz tech and we would be here for hrs going through the possibilities and sounds like you need an tranny rebuild
Posted on Aug 12, 2008
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Posted on Jan 02, 2017
Tips for a great answer:
Engine stalls cold or RPM
fluctuates at idle up and down or dies near idle.
This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control. If the above cleaning doesn't cure your issues you need to have the computer controlled automatic idle speed control system diagnosed and repaired by a dealer or electronic engine control repair shop.
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