ok here i go my little cousin has a 90HF crx. I gave him my CAI from my 91 Si crx well the differance in the size of the CAI and stock intake was like a good inch. so what we do is i put my old bored out Si TB on to his HF manifold. everything bolted up liike it was ment to be there.I was able to put the HF TB inside the bored out SI TB. ok so everything is bolted up and we start the car. the idle is so out of wak it sounds like a shot as rotary. so i get the idea of putting in my SI ecu. so i did this and the idle stop going up and down but its at like 3000 at idel. so iam thinking its the throdle cable but it has slack in it and when i tightin it th eidle goes higher. what could be wrong with it?!?