Hello All,
I'm having a strange symptom with my GLC040AFNUAE082. Serial # is: A809N05268U. After decelerating from WOT, whether under load or not, the engine misfires slightly. It just gets kind of lopey at idle for about 20 seconds, and then smooths out. Ignition components are less than a year old, so I don't think it's a spark problem. I did notice that the "guts" of the PCV valve are gone, so it's essentially an uncontrolled vacuum leak as opposed to a controlled one. Could this cause a lean misfire on deceleration?
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