So I have a 92 Prelude si h23, just got done swapping an h22. Kept my stock auto tranny. Wired up everything right, but haven't gotten rid of that external coil yet - it just dangles there. My shifter wouldn't come outta park and I don't know how to fix that (where to run wires), so I just use the key release. My problem is that vtec won't hit. At all. None. Nothing happens all the way to redline (which is still h23 redline) then when the tranny shifts, CEL 21 comes on. What the hell? I've checked and double checked my wiring, the solenoid, everything. Between the 4 best Honda guys in my town, we're all dumbfounded. Do I need a new tcu? I have the p14/p15 tcu now. Do I need the p19? I've heard mixed reviews on whether or not that tcu will even work.