99 mercedes ml 430 hesitating and idol problem

Asked by Dec 04, 2014 at 08:52 AM about the 1999 Mercedes-Benz M-Class ML 430

Question type: Maintenance & Repair

I recently change the mass air flow and oxygen sensor but I am still having the hesitation
when i start from a stopped position. Since i changed the parts it is now surging when
idling and then stalling. If anyone has any suggestions it is greatly appreciated,

4 Answers

7,895

check iac valve

1 of 1 people found this helpful.

Where is this located?

7,895

on the throttle body

25,135

Was the replacment mass air flow part OEM mercedes or a cheaper aftermarket version. I have heard that the aftermarket parts can cause issues.

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