2001 ML 320
I have a 2001 ML320 and Im getting A EVAP system leak code along with cylinder mis fire codes. I changed my spark plugs and wires just to ease my mind, plus they were in for over 90,000 miles. Any suggestions on checking the EVAP system itself? I see the purge valve has a clicking noise to it but Im not sure if thats from a leak in the system or its actually going bad.
1. check fuse #45 in the underhood fuse/relay box and see that it is not blown.
2. remove plastic engine cover.
3. with a cold engine, have someone start the engine while you determine if the Air Pump is running, feel with hand and it sounds like a vacuum cleaner. If so immediately shut the engine off. If it does not run, post back for further directions.
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Like Witek told you on the other site, check the hose in the rear.


