99% they just replace the motor.Yes they left the original vtec ecu
And the vtec intake manifold . The only thing they changed was the engine . I'm not sure if they changed the engine harness or not .
The vtec solenoid and pressure switch are on the back side of the head, right next to where the distributor connects to the cam.Just bought a d16y8 head now the problem is I have a y7 harness.. The guy who sold it to me said I need to get vtec solenoid plug and vtec oil pressure switch and connect it to the ecu . He didn't tell me exactly how to do it he said it was easy though . Any advice?
RDoes the y7 head have a knock sensor? is it different than the y8 sensor?