First off, *I AM NEW TO HONDAS, AND I BOUGHT CAR W/ B16A SWAP ALREADY DONE*

Now, I have an OBD1 B16A hooked up via the ek's OBD2 SOHC harness.
It is a mess, with many wires not connected, sensors on engine itself not having a dedicated connection from harness, tension on harness portions that were too short to reach given sensor (and vice versa).

Another annoyance is how the OBD1 ecu sits loosely in the cabin cuase the OBD2-1 conv. harness leaves no room to bolt ecu to chassis.

My Question... is their an OBD1 harness other than the one that should have came w/ my motor, that will allow me to plug up most/ all harnesses onto motor, and do away with the conversion harness in the cabin?

I know that the best option would be to locate a b16A harness and ecu, but its hard, most shops will not sell them seperate from an engine swap purchase.

Thanks, in advance.

 

Use your OBD2 harness and if portions are too tight, cut and splice in wire to lengthen it. Make sure to use heat shrink tubing over solder connections and cover the whole deal with loom to make it look OEM and clean.

You just have to deal with the extra bulk of the conversion harness. You could mount the ECU somewhere else, like on the firewall behind the glove box to get it off the kick panel area.

Otherwise, go on eBay and get the parts if you insist on doing that. It's about the only option other than the junkyard.

 

In short, no. The OBD1 engine harness is a two-piece design that spits at the shock towers. OBD2 civics use a one-piece design. As the above poster said, you are supposed to use your SOHC OBD2 engine harness and modify it to fit the OBD1 engine. You may have to cut and extend wires to reach the appropriate sensor.

What year is your car? If it's 99-00 you may be able to use a Si engine harness which would be plug and play. You'd still need the conversion harness if you are running an OBD1 ECU.

 

thumper64: What about the MAP sensor, its sits loose in the engine bay, receiving map pressure from a vacuum tube that connects to an open vacuum pipe on the intake manifold. I have seen other hondas and the Map sensor mounted to the throttle body. Is this how the MAP sensor normally sits in an OBD1 swapped ek?


B18CivicEJ8: my civic is a 98. And isn't a 99-00 si essentially the same as the 96-98? same chassis; would i not be able to use the si harness on my car? SI harness is OBD2, would it still plug up completely to my OBD1 B16A?

 

Unfortunately, no. 98 uses OBD2A which is slightly different than 99-00 Civics which are OBD2B. If the current harness is a hacked up mess, I would find a 96-98 EX harness. An EX is a SOHC VTEC so you wouldn't have to add wires. You may have to cut and extend, but at least you'd start off with a clean harness that isn't suspect. You can check out Rywire if you have the cash. They make custom harnesses for whatever application you want.

http://rywire.com/store/9600-civic-d...90ac366a7753ad