Hey, I just got a 97' civic dx. It has a healthy motor and I was thinking about throwing a turbo on it and tuning with crome. Do I just need an obd2a to obd1 harness and run an obd1 ecu? what if I want to change out to a y8 or aftermarket IM+TB?

 

Yes, you'll need an obd2a to obd1 conversion harness to run a obd1 ecu. Also to run obd1, you'll need the intake manifold from the Y8 5-speed, also the throttle body, but you can also use the b16 throttle body as well, but the IM from the Y8 is important because you need to run a 2-wire iacv, instead of a 3-wire iacv, which all y7's, and all auto y8's have. Aftermarket is also an option, but using a 5-speed Y8 intake and TB is the easiest route to go.

OBD1 - must use 2-wire IACV! 3-wire IACV will not work.



Here are some links to help you:

http://technet.ff-squad.com/



These links below are for OBD2B! If you're OBD2A, use the link above and go to the correct links under 'ECU & Wiring Tech'.


Remember: 96-98=OBD2A; 99-00=OBD2B

http://technet.ff-squad.com/wiring.obd2b.htm

http://www.ff-squad.com/tech/wiring/wiring.99-01.jpg (3-wire to 2-wire IACV)

http://www.ff-squad.com/tech/wiring/...-01_b-plug.jpg (Don't forget to do this, or it won't run; at least it wouldn't with me)

http://www.ff-squad.com/tech/wiring/...in_removal.jpg