Ok guys this is the problem. Motor is a built b20b with GSR head. Got a p28 ECU chipped to skunk2 settings. I'm using my old ls wiring harness. Now a fellow H-T member said the VTEC solenoid line is A4 and the Oil switch is D6(Thanks again bro). My ls wiring harness has those pins filled. I had some wires made when I was running the p72 ecu. It worked out fine. And when I changed it to the p28 ECU, no CEL. However, my vtec is not kicking on. So I unplugged the two wires and tried to jump the solenoid to see if it was working. You can here it click. So i'm guessing the solenoid is okay. And then my CEL came on. I'm thinking it is because of the two wires that I pulled. Are the Vtec solenoid and oil pins the same on a p28 and p72? And why wouldn't my vtec kick on? I don't get it!!! I've been tampering with this thing for the past three days, and I can't seem to get it. Please help. Thanks!