Suggestions?
Hi all. I have a 2008 1.3 diesel Doblo. In the last fortnight it has developed a high pitched screech from the engine and, more recently, slightly hesitant performance when in the turbo range (sort of on/off acceleration). No smoking or any other issues. Any help greatly received. Thanks.

Screeching would suggest metal to metal contact

However, it could be as simple as a tiny hole in a hose, allowing air to escape causing a screeching noise and loss in performance.

Only way to find out is to check all hoses and intercooler for holes....

Thanks Andoo, I'll take a look.