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Old 01-20-2019, 04:17 PM
Gregory891's Avatar
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If you've replaced the mass flow sensor, have you driven the car enough for the car to reset trim and other values?

What caused your car to all of a sudden start running in a strange way? What specific fault codes do you have? Likley not teh root cause at all, but I assume that your air and fuel filters have recently been replaced and that the PCV filter (which you should replace every 2nd air filter OR update to the vortex type) isn't clogged.

If you have access to a mechanic's smoke machine, you could easily look for an intake or similar leak.
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2002 Euro X5 (E53) 3.0 diesel (M57)
5 speed manual with UUC short shifter.
Pre-xDrive NV125 transfer case (chain & gears).
Factory Xenon headlights, Spyder LED tail lights
Updated vortex crankcase breather.
Motorsport dead pedal, factory fire extinguisher, factory first aid kit, factory F&R mud flaps, factory PDC

Bilstein B6 shocks F&R
Redline oil has replaced "lifetime" fluids (F&R diff, manual transmission, transfer case and P/S).
Dimple magnetic drain plugs in all compartments.

Last edited by Gregory891; 01-20-2019 at 04:43 PM.
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Old 01-23-2019, 02:57 PM
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Thanks for the reply
Bought the car this summer and found out that the previous owner has run without air filter for a long time and therefore expects that he also has not changed the pvc filter ever ...
did not now that is necessary to have to drive the car for a while for car to reset trim and other values, how far must the car then run before this happens?

Has now received a new error message that I have not had before and which I expect may be the cause of unstable rpm, possibly one of the vacuum hoses may have loosened or something
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