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ELIMINATOR1 · Sep 13th, 2017, 18:10

V50 2.0 diesel, 2005. 231,000 miles

My car is sometimes very sluggish,other times it is OK.
I had this once before, but, it was permanently sluggish and would not rev over about 2,500rpm. Sprayed the mass air flow sensor with contact cleaner, turned out the air filter was filthy.

This time out of curiosity I removed the turbocharger inlet pipe from the front of the engine. Hope I have the right terminology here.
Looking in to what I shall refer to as the air inlet manifold, ( edit....actually it's the throttle body) is what would seem to be a a flap, it was quite oily inside this inlet assembly, no worse than when I last looked about 15,000 miles ago. EDIT... after watching some you tube videos, it seems that the air temp. sensor is here
aswell

I started the engine and sprayed carb cleaner into the manifold, aiming it at the bearing surfaces for the flap. EDIT.... probably sprayed and cleaned the air temp. sensor at the same time. Connected everything back together, went out in the car, instant turbo thrust. For all I know this was just one of those times when the car is performing correctly, and has no connection with my actions.

1) Could it be the case that this flap is jamming up, due to the crud in the general area?

2) It seems to be vacuum operated, is this correct?

Sep 13th, 2017, 18:10	#1
ELIMINATOR1 Junior Member Last Online: Feb 10th, 2018 18:24 Join Date: Nov 2014 Location: Eastleigh	Random performance loss on 2.0 diesel. V50 2.0 diesel, 2005. 231,000 miles My car is sometimes very sluggish,other times it is OK. I had this once before, but, it was permanently sluggish and would not rev over about 2,500rpm. Sprayed the mass air flow sensor with contact cleaner, turned out the air filter was filthy. This time out of curiosity I removed the turbocharger inlet pipe from the front of the engine. Hope I have the right terminology here. Looking in to what I shall refer to as the air inlet manifold, ( edit....actually it's the throttle body) is what would seem to be a a flap, it was quite oily inside this inlet assembly, no worse than when I last looked about 15,000 miles ago. EDIT... after watching some you tube videos, it seems that the air temp. sensor is here aswell I started the engine and sprayed carb cleaner into the manifold, aiming it at the bearing surfaces for the flap. EDIT.... probably sprayed and cleaned the air temp. sensor at the same time. Connected everything back together, went out in the car, instant turbo thrust. For all I know this was just one of those times when the car is performing correctly, and has no connection with my actions. 1) Could it be the case that this flap is jamming up, due to the crud in the general area? 2) It seems to be vacuum operated, is this correct? Last edited by ELIMINATOR1; Sep 13th, 2017 at 19:13.