Out to pick somebody's brains again.

Has any one come across a problem with their E3 3.0 si, where under between two thirds to full throtle, the engine pings followed by large ammounts of smoke from the exhaust pipe.

I do not think it is oil smoke as the car does not seem to use much oil and has an origional milage of 11200 miles.

Any suggestions as to what the problem might be would be most welcome, i think the smoke is a result of unburnt fuel.

The timing has been checked and is spot on.

I look forward to someones advice.