| | R56 Cooper S fault codes/ no boost
I am posting this thread on behalf of my son who had a low speed impact with a tree stump in the snow, the resulting damage was to the front bumper,inner bumper and a burst intercooler.The damage has now been repaired but there have been several engine management fault codes. these have now been resolved except for the boost pressure sensor which still comes up as a fault code. The sensor has been replaced with a new one and |I have checked the wiring for continuity between the connector and the ECU but the fault will not clear.
I removed the sensor and started the engine to see if there was any boost..even with reving the engine there is no boost, I removed the outlet from the turbo and blew my air gun into the pipe and was getting pressure coming out of the sensor hole. I then started the engine and looked into the inlet side of the turbo to see the impeller freewheeling I then stuck the handle of a screwdriver against the impeller shaft and it stalled easily... I then got my wife to rev the engine and the impeller stalled with next to no pressure.
So my question is.... is the waste gate jammed open or is it being held open by the ECU due to there being a fauld code? Any info or suggestions would be much appreciated.