Hi,
I have a Fiat Doblo 2004 1.8 diesel car. It has suddenly developed a problem. I am finding that it is loosing power in all gears. I blamed it on the fuel filter, which I have replaced, I also replaced the air filter aswell. This did nothing. I unplugged the air intake switch and checked it, it was all in order, but the problem still exists. There are no engine management warning lights being displayed, no unusual noises coming from the engine, the exhaust system is fine and the fuel pump seems to be fine. I have checked the timing belt and it seems ok. Has anyone got any insight as to what this problem could be? Could it be the turbo on its way out, could it be air in the fuel system? Thanks for your time.

hi there
my name is brad.i am no expert but have had similar problem.my van wouldnt rev over 3ooorpm and had no power.after having many items checked i found that the impellar on the turbo had broken in half.the van started on the button but when revved it filled the close i live in with black smoke due to the fact there was not enough air intake going into the engine.turbo is easily checked by removing the air intake pipe on the turbo.then see if theres any movement on the impellar.
hope this helps.