I bought a 97 ek hatch and I bought a b20 block and fully build it and I got a b16 head and I finally finish the swap and got it but now I need a wire harness I heard I need a obd2 and other said obd2a and then other said obd2b so I’m confuse can anyone please help I need my dizzy obd2 and injector but came with pigtails from South Bay and dizzy is the big one plug and ecu I have is a s300v3 in a p28 but I have jump harness just Incase I needed it

 

Your car is OBD2A

 

Thankx and is this a obd2a harness or naw

 

 

It looks more like an OBD-2B automatic engine harness.

 

Ok if I see a speed sensor plug then it’s 5 speed rite I just want to make sure before I buy a obd2a that I need or can I use this I know I need a adapters for thr dizzy but what eles I need is this harness not auto

 

Honestly - stop right where you are and don’t throw away any more money on 22-26 year old oem harnesses or shitty jumpers.

just go to Rywire/Wireworx/CJ’s and get yourself any budget harness made specifically for your setup. Then enjoy not having problems down the road.

 

Both Auto and Manual engine harnesses will have a VSS 3-Wire plug. Regardless of which you use, if it is an OBD-2A engine harness, it MUST have 3 ECU plugs and the green crossover plug at the ECU end if it is a MANUAL engine harness, and 4 ECU plugs and the green crossover plug at the ECU end if it is an AUTOMATIC engine harness.

Also, spAdam has a good suggestion above. Factory engine harnesses that fit your application are really old by now, and the potential for additional long term issues certainly exists... not to mention, repairs are likely necessary to many plugs before you actually use it. The one down side to moving to an aftermarket solution as spAdam has suggested is that these harnesses do not have shielded wiring for all necessary positive side wires that need RF protection... specifically, all three distributor sensors (TDC, CKP and CYP), the Knock sensor and the O2 sensor. Choose what makes the most sense for you.

 

OP, do you still have the original 1997 EK Hatch engine harness ? Have you considered modifying it to fit your B20VTEC engine ?

 

For real? I would have thought Rywire and other established harness manufacturers would surely use shielded wire where needed. But I've never bought an aftermarket harness, so I wouldn't know. That's surprising, as it's not difficult to buy or use shielded wire.

 

One would think... but unfortunately, I have found no custom engine harness (at ANY price) with shielded wiring.

 

That is unfortunate. If I bought one I would be disappointed about that, and I'd probably end up opening it up to add my own shielded wire.

 

I didn’t realize that, interesting.

To be fair, in the few looms I’ve built I’ve gone both ways (shielded/unshielded). The only negatives I’ve been able to notice in the unshielded ones was a noisy knock sensor signal, although the ecu could still sort out the knock it was hard to pick out by human ear. I think it’s good & proper practice to shield, but I’m not sure it’s 100% necessary. Current build has shielded position and knock sensors.