Before anyone asks, I've already used the search function and it returns nothing useful for me. The places I've checked so far are Hybrid Garage and Hasport for wiring info and they just haven't been clear enough as to what to do.

I have a 1988 CRX DX that I need to put a B16A into. I have already created a VTEC Subharness for VTEC, VTEC Oil Pressure, Knock Sensor and JDM 02. It uses pins going into the ECU plugs, the correct plugs going to the sensors and the most soldering done is once per wire, cleanly, heatshrinked, wire loomed (with correct sized factory wire loom) and then finally electrical taped around the wire loom the whole way. It's a clean harness and works very well.

I am wondering what EXACTLY do I have to do for an MPFI conversion with the following considered. The B16A has an 88 CRX Si harness on it and the above listed VTEC Subharness that I made.

Here's what I THINK I've figured out so far, correct me if I'm wrong please:
- A wire needs to come from Pins A3 and A7 and go to the wires that pin into the plugs of injector plugs 2 (A3) and 4 (A7). Don't the injector plugs have two wires going into them? If so, which wire do I tap into with the new wiring coming from A3 and A7 down at the ECU plugs? If there is just one plug, I'll get a long wire with a pin on it from another spare A plug, pin it into the DX ECU plug, cut the wire coming from the injector plug and solder the new wire from the ECU to the rest of the wire sticking out of the plug and I'll do that for both of the injector plugs. Is that the correct way to do that? (I'll have all kinds of leet wire routing and looming and stuff to make the harness clean)

-Here is what I can tell from the wiring diagrams from Hasport's website... it says that a wire needs to go from B10 on the ECU plug to the Sensor "CKP P" and from the B12 pin to the sensor "CKP G". It says that on the DX before you modify the harness, the pin with the wire that goes to either one of those sensors both come from pin C1. WHAT THE **** DOES THAT ALL MEAN?

I just want to know EXACTLY and SPECIFICALLY has to be different AT THE ECU plugs on the DX harness when you convert it to MPFI and then where those different wires go to on the engine assuming that I'm using an Si harness and already have a VTEC Subharness...

I cannot find complete instructions for this anywhere! I've searched and I keep running into stuff that's incomplete, doesn't make any sense and is not quite what I'm looking for. I can't have my car down for a long time to do this engine swap. I can sit down and do it in one sitting pretty quickly but I need ACCURATE instructions, can ANYONE at least point me in the right direction or just tell me what wiring has to change on the DX harness or something? I just want to fire it up the first time without any check engine codes (which sounds ridiculous, but I do it all the time as long as I have the right instructions)

Help me Honda-Tech, I need to do this ASAP!

 

You need to using the DX harness and do the mpfi conversion to it..

Using the Si harness is not going to work without extensive rewiring
because the chassis harness is different between the two models..

I did the swap and wiring conversion all at the same time and the info
can be found here: https://honda-tech.com/zerothread?id=637661

 

it's a lot easier if you just convert the DX harness. had a buddy try to put the si harness on his DX and there was all kinds of problems with the car, so i converted a DX harness to MPFI.