Well, if the MAF theory strikes out. I'd try to get a tune for the intake or get rid of it. The 02-07s really hate the intakes to be switched out without a tune. The 3rd gens can't really run anything either without a tune. But, some of the intakes can be tuned for with OS maps made for them. So, do the homework accordingly.
378awhp/373wtq Custom Dom 3 & CBRD tuned 2006 STI.
"When in doubt...flat out" - Colin McRae
Last edited by turmic; 03-26-2011 at 06:46 PM.
Reason: some botched details...