I'm almost done putting a Y8 head and manifold on my D16A6 block into a '89 CRX Si. I can't figure out this last obstacle.

I know that the modules with a two-wire connector on the pass. side back of the manifolds serve the same function, but they have different connectors. They also don't have the same bolt pattern, so I can't just swap the old EACV to the newer manifold (correct me if I'm wrong).

I can cut off the old connector put new female spade connectors into the Honda connector on the Y8 manifold, but how do I tell what wire goes where? I figure it matters . . . I don't want to just guess, do it backwards and smoke the ECU or something.

Thanks in advance!

 

ok the 2 wires that you need to look for on the CRX harness are BLK/YEL (A17) and BLU/YEL (C2). They should be the same color as the Y8 head.

 

if i remember right the iacv/eacv from the manual y8 manifold and the a6 manifold both have the same 2 wire plug...

the plug from the a6 harness should plug right into the y8 iacv.

 

Thnx for your replies wickedB16 and fastcrxsi90, but the connectors are in fact different. Since I don't have the wire that used to plug into the IAC on the Y8 IM, I can't just reference it by color.

I know that all D16A6's are not necessarily exactly the same in terms of wiring connectors - a friend of mine has a '90 Civic Si and we swapped it out for another junkyard D16A6 b/c it was burning tons of oil.

We found that the harness going to the injector resistor box had different shaped connectors, and even had a different # of wires in it. We tried to rig it together but we had a check engine light. After the old wire harness was swapped off the old engine onto the new one, it worked fine then though.

 

You guys were right - it does plug in. The connector on the Y8 IAC valve seemed to have an adapter on it - once I figured out I could remove that, and that the actual connector was underneath it, the old A6 EACV connector plugged right in.