We have just transplanted a B16a2 into a non vtec 1993 EG civic hatch. We're using a 1993 obd1 P30 ecu which fitted straight on to our harness. The engine works fine and starts first time. Problem is wiring up the VTEC. We ran the wire from the VTEC solenoid to the correct pin on the ECU, however the ECU requires a wire for the VTEC oil pressure switch. Our engine does not have the seperate green oil pressure switch (Honda advises on later generation engines like ours the oil pressure is incorporated in the VTEC solenoid and only one wire runs to the ECU) Can anyone advise what needs to be done to get round this. The check engine light is on and VTEC will not engage. We have the engines original ECU, but this does not fit our harness. Please help!!!!