I have this very problem!

I got my ST170 a month ago, and the throttle response is practically none existent?!

Revving from idle it is Very unresponsive and driving through the rev range in each gear it is just really slow.

I have replaced both pre and post cat lambdas as they Dyed on me.

I would be very keen as Seddo to any light being shed on this issue??

(Not my only issue)

I have had it in the air 4 times so far looking for an exhaust leak which is non existent! I am pretty sure the ST170 is suppose to have a grunty sound to usual ..... mine sounds like it is blowing really bad from the front or underneath but looking there is no sights or sounds of a blow anywhere!

Secondly The top end has A Follower slapping tapping sound from the top end .... Also pretty sure this should not sound so rough .... or do they usually?

I am a more classic Ford owner usually with the XR2I's/3I's, Escort GTI's, RS Turbo's and Most recent my RS1800 So a 2002 motor is All German to me when it comes to the Different bits on the ST170

Any help would be a great help in clearing up my issues?

Thanks in advance

JAY