Stalls at idle?

2005 MERCEDES BENZ C230
140 MILES • 1.8L • 4 CYL • TURBO • FWD • AUTOMATIC
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BRYAN2017
  • MEMBER
  • 1 POST
Rpm idle fluctuates up and down like the engine going to shut off. This happens when the car is stop at stop sign or red lights. When accelerate it is normal?
Aug 1, 2017 at 10:19 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,837 POSTS
  • ASE Certified Mechanic
Hello,

I would check the rubber boot between the MASS air flow sensor and the super charger. These cars have big problems with them leaking and causing the engine to have the idle fluctuate. It is tough to get to so be ready and use a flashlight.

Please let us know what you find.

Cheers, Ken
Aug 27, 2020 at 6:22 PM
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