engine surging at idle, poor gas milage? - PeachParts Mercedes-Benz Forum

jimsclub · #1 03-08-2005, 11:30 AM

Two weeks ago I noticed that my gas milage went down 40% and the engine started surging at idle about every 3 or 4 seconds. This happened right after I changed the fuel pump and o2 sensor. Anyone have any thoughts on what the problem could be???

Jim H · #2 03-08-2005, 12:12 PM

Why did you change the fuel pump and O2 sensor? Sounds like one of the 'new' parts may not be good, or may not have been needed.

Best Regards,
Jim

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