I had recently purchased accord 92 with 98 accord engine swapped in it by previous owner. F18B is the engine model but tranny is old 92 model with kick down cable.
anyway

On Inspection the pin diagram of my ODB2b ECU i found out few abnormalities.

I have following wires missing from harness.

1. Knock Sensor
2. VTEC Pressure Switch
3. CKF Sensor P side
4. Vehicle Speed Sensor
5. CKF sensor M side

Question is How come car knows when to kick in VTEC ? if it does not have connection to VTEC Pressure switch and Speed Sensor.

My guess is that he has connected VTEC with Pressure switch i guess.