Maf Replacement

[0yorkie0]

I recently replaced my MAF w/ a Bosch replacement for my 96 c220. I expected the rough idle and the horrible first couple engine starts, but its been 3-4 days of the same thing. Driving wise its smoother but! when idling(in ANY gear) it lightly revs(700-1k). Has anyone else had this problem? What is the longest adaptation time for this situation?

[W202FTW]

Any CELs?

[0yorkie0]

Not at the moment. The old one would occasionally, But this one hasn't yet

[hipnimahop]

1- try to replace your Fuel Filter.
2- Change your spark plugs (OEM ONES)
3- if not fixed, it might be your coils or your spark plugs cables.
4- or your Oxygen sensors at last.

please provide more info about the car.

[syncview]

your first step here is to look for a vacuum leak

[johnnybravo]

syncview, excuse the vagueness, but how do you go about diagnosing a vacuum leak, im 70% sure i have a leak somewhere although the car locks/unlocks fine, headrests work fine etc but how would i go about checking all my vacuum lines?

[hipnimahop]

check your throttle body as well. it gets really dirty because of the valve cover breather and it affects your idle. ( I disconnected mine for this reason)

[0yorkie0]

Ok, update.. Spark plugs changed, no change.. Fuel filter changed, OMG a little shake(as always showed a bit of the problem

But still reving when warm. Im interested in an vacuum diagram if anyone has still got one.. All the links to the ones in search are outdated and broken....

[taz069]

If your liner is still under the hood their should be a vacuum diagram on it. Passenger side well atleast my 96 c280 does.