How do you arrive at that diagnosis then? Yea could well be one of those items (we all know the trouble these two items cause on Vecs), could also be a turbo fault, could be something rattling in the engine which the knock sensor is picking up and retarding the ignition or even a faulty knock sensor or even loose(torque setting is critical for a knock sensor), could be a faulty MAF sensor, could be a faulty throttle pedal position sensor (Either one), could be a faulty temp sensor etc etc etc. lol. Anyway, you may well be right in your diagnosis
, lets see what his tech 2 throws up.
EDIT: PMSL just seen your edit
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