Hi - I have a 1996 A4 TDI 110 with a respectable 192k on the clock which has until now performed perfectly. It has developed loss of power when accelerating hard or under load. It also blows dense black smoke while accelerating hard.

I have someone with diagnostic equipment have a look and he tells me that the MAF sensor is showing a fault. He says that he 'thinks' the MAF sensor is part of the engine management unit on this car.

I understand the MAF sensor monitors manifold pressure and if so would be connected via some pipework to the MAF sensor. Could it be that this pipework could be faulty and is there a reliable way of testing it?

Can anyone confirm the location of the MAF sensor on my car? The engine # is AFN073790 and the chassis # is WAUZZZ8DZTA323297

If the engine management unit is faulty can anyone recommend someone who can carry out reliable repairs?

Thanks - Dreamweaver