Thread: 2009 Colorado Engine Problem

My mate has a 3.0L 4x4 Holden Colorado 2009, Common Rail. When he accelerates with foot to the floor from low revs it blows smoke and can hear a very distinctive knocking noise coming from the engine, it's fine once the revs are 3K+ but is very noticeable even during ordinary driving. It's also noticeably down on power.

I was thinking injector problem?

Any ideas?