Power loss up hill Viano W639

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AnRuaRi

New Member
Joined
Dec 8, 2017
Messages
1
Location
England
Car
Viano 2.2 2007
My Viano (2007 W639 2.2CDI Auto) looses power when traveling uphill. if cold it can have trouble maintaining any existing speed, and has NO acceleration. i.e. it is near impossible to increase speed once on the up hill. on the motorway it commonly looses power going up hill and slows down significantly.

The fault is intermittent, and more likely to occur when the engine is cold. Sometimes the problem seems to suddenly dissapear (mostly when well warmed up) Other times the problem appears absent.

Known issues: Oil leak from the Air/Oil Separator. new part ordered to be fitted.

New problem today: Alternator cut out on the school run. It is contaminated by the oil leak so I assume that's the cause. is this likely to be user serviceable (clean the oil out of it) or is it likely to need replacement?


Many Thanks
 

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