Hi,

I have boost on idle when I throttle.Why?

When turbo boost, the car began to knock and smoke black..Why?

 

hi mate ive got the same problem and ive been told its the fuel

 

I need urgent help...

 

A small turbo will always produce a small amount of boost when free-revving, perhaps 2-3 psi. If you have any more than that, I would advise getting the timing checked and due to your other problem it really needs tuning by someone with the correct equipment to do so.

 

Thanks...

Any advice how I can repair it...?