I'm have JDM Accord CF4 SirT with F20B, I would like to have the ECU tuning by convert the stock ECU (OBD2b) to P28 chipped ECU by using jumper hardness (OBD2b to OBD1).
I am having problem on the IACV as stock connector is using 3 wires, but OBD1 using 2 wires only. How can solve this problem?

 

If I remember correctly you will have to replace the three wire IACV with an OBD1 two wire IACV from the H22 Prelude. You will need the connector from the H22 IACV as well. De-pin the 3 wire connector and use the two appropriate wires in the two pin connector. If you are not able to de-pin the connectors you will need to splice/solder the wires for the 2 pin IACV connector onto the corresponding wires of the existing harness.

The two wire IACV is wired with a 12v (+) source (YEL/BLK) and a ground wire (-) (BLK/BLU or BLK/???) that goes to the ECU @ pin A9.

 

Thanks for the reply...is that the IACV from H22 prelude can direct bolt on the F20B intake manifold?

 

yes

 

Thanks! where can I get this H22 prelude IACV?

 

Might be able to find one at a local junk yard, local dealership or an online parts retailer. Honda Part number is 36450-P13-004.

http://www.hondapartsdeals.com/honda_parts.php

http://www.hondaautomotiveparts.com/...artsSearch.jsp

 

Thanks....but i checked my car IACV shape is different from H22 prelude one.....