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njones500
Guest
Hi, I have a C Class W203 220CDI which has a habit of the revs hunting and fluctuating by about 200 revs, this happens at various speeds and revs. Any ideas what could be the cause of this, I've checked lots of threads but cannot find this particular fault. Its worse at around 70mph but will stop at 65 or 75, it is also bad at 30 or 50mph. Yet sometimes its fine at these speeds. I have tried running with the air flow sensors disconnected this makes no difference. Any help welcome, thanks.
