280SE 3.5 misfires and flutters at idle speed - Mercedes-Benz Forum

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post #1 of 1 (permalink) Old 03-05-2011, 10:32 AM Thread Starter
BenzWorld Junior Member
Date registered: Jun 2009
Vehicle: 280SE 3.5
Location: Istanbul/Turkey
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(Thread Starter)
280SE 3.5 misfires and flutters at idle speed

Hi everybody,

I have some problems with my M116 3.5 d-jetronic engine for a long time that I still did not understand the reason .The problems are,on idle speed engine flutters little bit(not too much).It can be realized easily when the car is warmed up and at idle speed. Also on idle or on gear, when I push accelerator pedal, engine misfires at intervals(not continuously) and this causes improper acceleration or lack of power.For instance, at idle speed, when I push accelerator pedal little bit and keep it stable at lower rpms, engine misfires but not too much.It looks like one or two injectors do not inject sufficient patrol or inject less then normal.However, while driving, there is no misfire.All injectors seems to be working.But I feel the power difference before and now( I checked fuel pressure by connection gauge between injector lines to fuel pressure regulator and read value as 2 bar.Ignition system tested, it also works properly.Trigger contacts were removed and cleaned but same.

I also check throttle valve switch, it clicks 20 times.Only I did not check valves, do you think that some valves are tighten.I think that this can also cause some fluttering and misfire on idle speed.

Waiting some help to solve this annoying matters....



Last edited by Jazzenco; 03-05-2011 at 10:36 AM. Reason: spelling
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