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· Registered
2001 ml 320
21 Posts
Discussion Starter · #1 ·
Drives terrific except during hard acceleration or high speeds. Check engine goes on. Code says cylinder misfire. car runs rough. Restart brings car back to normal status. Just passed inspection for emissions. Any ideas out there?? wires, plugs etc

· Outstanding Contributor
2006 ML500 2002 ML320
17,942 Posts
it was done with an emissions odb unit.

If you are sure it was cyl. #6, then switch the ignition wire from #6 to #5, then take it for a test drive and see if the misfire is now on #5 cyl.

If the misfire remains on #6, then you must do the same thing, one at a time, with the spark plug, and then the coil. But without having a scanner or code reader, you will never know if the problem has transferred to the other cylinder.
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