turkey_blaaaah

I swaped a jdm D15B VTEC into my '94 civic CX hatch. I got a P08 ecu that has a "JUN" chip to go along with. The problem I am having is that I keep getting codes 1, 21, 22. should my O2 sensor be converted to a 4-wire? I used my original harness that is wired for 1-wire. I tried a new O2 sen. but still getting cel. Next, I hard wired the VTEC sel. and since the engine didn't come with the pressure sensor I left that alone. Am I getting a code 21 because of the pressure sens.( code 22) not getting recognized?

CivicSpoon

Yes you need to convert the 1 wire sensor to a 4 wire: http://www.hybridautomotive.com/tech/o2/#one
Code 21 is VTEC Solenoid Valve and code 22 is the VTEC Oil Pressure Switch (yes you do need that). Did you run the solenoid to pin A4?

Slopoke

If your motor did not come with a vtec oil pressure sensor(like the jdm itr motors), but your running the motor off of a usdm ecu(which is designed to use that sensor), you can trick the ecu by taking the wire that is supposed to go to the oil pressure sensor and tapping it into the wire that goes to the vtec solenoid.
This is how many people have done it, including my brother who has been running this set up for a couple years now, with out any problems.

turkey_blaaaah

Thanks for the help I have gotten so far. yeah I hooked the VTEC sel. to pin A4.( I hope. I went off of the labeling on the board inside the ecu.) Thanks again guys!