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-   -   2002 c240 rough idle (https://www.benzworld.org/forums/w205-c-class/2993945-2002-c240-rough-idle.html)

danboy56 06-24-2018 04:27 PM

2002 c240 rough idle
 
My 2002 c240 has rough idle. Had misfire code show up and replaced plugs and wires. I used oem wires and ngk plugs. The misfire went away and the car runs fine driving down the road. Did a smoke test and sprayed brake clean on intake to check for vacum leaks. Long term fuel trim is a little high on bank 2 6.2 to 12 bank 2 1.6 to 3 at idle vacum is about 15 and it should be around 20.


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