Apparently there was a valve in the inlet manifold that used to modulate to maximise the torque at any particular revs.
Could be same set up I took it to a Bosch centre who replaced it for £100
What is an Inlet valve potentiometer on an Audi Diesel engine?
A mate has an audi diesel and Audi reckon that he needs 2 of them @ £360 each plus £200 for fitting to get his management light offf but the car runs
fine.....
I had a fault on my Mercedes diesel - 'inlet channel' potentiometer.
Apparently there was a valve in the inlet manifold that used to modulate to maximise the torque at any particular revs.
Could be same set up I took it to a Bosch centre who replaced it for £100
Chrysler 300c (merc v6 diesel) has a swirl pot actuator that goes faulty it controls valves in the inlet manifolds