'93 300e idle surging - fault code 009...advice needed
i just purchased a 1993 300e with 67,000 miles. an excellent driver but has a surge at idle ranging from 500-1100 rpm. i scanned the ecu and am getting a 009 hfm signal too high code.
my pockets are not deep enough to throw parts at it so am i looking for advice to further diagnose the issue. any comments appreciated!
thanks in advance,