OBD1 Chassis, Just wondering, since I am swapping an OBD 2 engine assembly into a 94 Integra. But the ECU, that is shipped, is a P73 OBD2, that comes w/ the engine. I dont have a VTEC oil pressure switch, I dont want to get another housing and dont want to buy a VTEC controller, so what do I do???

Absubtle
PA
PS- Perhaps the trick of the question might be answered.

 

Jump vtec pressure signal off your vtec solenoid signal...
Done.

 

i had the same prob in my vx when i swapped in my itr motor. i notice my vx motor's vtec solenoid had the green plug for the pressure switch, so i took it off of the vx motor and installed it on the itr motor. if the motor your pulling out has the vtec pressure switch it a easy fix

 

Doesnt the ECU need to see a ground thru the VTEC oil pressure switch in all conditions except in VTEC?! So the VTEC pressure switch, w/ enough oil pressure, will actually become an open circuit, instead of being grounded. So why would I want to tap VTEC Soleniod 12v source to a sensor that only needs to see a ground or open condition?
I just wired up a 5-wire relay instead. Thanks for the help

Absubtle
PA