hi, i am getting a small puff of black/grey smoke from the exhaust,
this only happens when i drop a gear and plant the throttle, normaly dont get any smoke or fumes with normal driving, no smells of burning oil etc,
should i be worried? what dose it mean? thanks Allan.

 

black normally means it's running a little bit rich ,grey though is oily smoke

 

could this be cause it has had full decat system?

 

possibly, i wouldn't worry too much about it when it starts doing it during normal driving it would be a worry imo.

 

thats what i thought but thought i would get a 2nd opinion, thanks mate.

 

Yea nothin to worry about, black smoke is unburnt fuel