Could someone please help with this?

I have a Dec '99 Uk Turbo. I have recently fitted a Bailey DV, K&N Induction Kit and a Ninja rear silencer. I have noticed a drop in performance more recently (mostly 1st & 2nd not giving the same 'kick').
Thought it might be clutch at first, but revs seem pretty normal with weight in car/up hill. Reading various posts on here and wondering if it is a MAF issue, or if my ECU needs a reset?

Thanks in advance,

Stu

 

ECU shouldn't need anything to run that setup.
I'm not sure about imprezas on this front but my 200sx felt really crap on bottom after a K+N was fitted.

Then again it feels mint on my impreza but I bought it like that.

Could be maff on its way out or maybe try the code thingy and see if it shines any light on it.

 

Cheers Nick,

Did an ECU reset earlier, no error codes and seems to have sorted the prob!

I had an old shape then new shape 200sx before my scoob! Cool Cars!

Stu

 

I still miss mine.

 

I miss mine sometimes, but not when the roads are wet!