Hey i have a 96 civic Hatch CX and it has a B16A2(si) swap running off a P73 ecu. When driving i get on it and at 4500 rpm it pops like Vtec but u feel the car being held back then at 6000 rpm it takes off like crazy. Just wondering anyones advice on a different ecu or what to do with this P73. Thanks for your time

 

Sounds like you should just get it on a dyno and get it tuned

edit: Relic1 has the right idea.

 

P73 VTEC = 5200 - 5750 depending on which one it is.
4500 VTEC = P72

the reason why it feels like it's being held back, a B16 doesn't like 4500 RPM VTEC point.

get the right ECU (P2T) OR get an OBD1 ECU and have it tuned.

 

He's right.... damn it he's right!.

 

Thanks for the info. I have a p2t but didn't kno the harness in the car was obd2a and ofcourse the p2t is obd2b. I wanted to somehow get a 99-00 harness and use the ecu for the motor or just get a p28 and have it tuned for the setup. Anyone have harness or p28? Thanks. Again