low power below 2500 rpm in 156 1.9 JTD
I have a 2004 alfa 156 1.9 JTD and the Motor Control System Failure came on.
I had a diagnostic done and the garage said it was 'low air quality' message. He cleared it and he said couldnt find anything wrong (I wasnt charged for this!);
It came back on again a day later. Drives as it should in low gears as I accelerate, but doesnt really kick in below 2500. On motorway, in 5th or 6th gear, really struggles up hills.
I disconnected the MAF sensor and drive felt the same.
I have cleaned EGR valve and no difference.
I am keen to try and fix this myself, but dont really know what to change? Is it the MAF or something else?
BTW I am still getting 56 MPG on motorway!