Okay, I have a 1994 CX hatch with a 1993 D16Z6 motor swap done. I have a P28 ECU out of a 1994 EX auto. My buddy did the auto to manual conversion on it and it works great, except no vtec. I ran the two additional wires at the Ecu pinnouts for the solenoid and pressure switch. I'm gonna re-check them tomorrow again to make sure. Can anyone think of why the ECU would not engage vtec and not thro a CEL. That's right, no CEL but no Vtec, and it is a P28 for sure. If vtec is wired wrong won't it throw a CEL? This has me puzzled. Car runs great but no vtec -Matt 1997 Spyder GST - sold! 1994 Civic CX - D16Z6 2000 Integra Type R - picking up May 15th!