Hello everyone,
I am brand new to the scene. I recently purchased my buddies 88 hatch. He had this hatch since 1998. It was B swapped in 2000. He got put in a B16A with a PR3. 5 speed cable transmission. All JDM rear lights, JDM front lights. TE37 Volks Rays Engineering 17x7.5 brushed metal rims, on coil overs. My son, who is now 17 say this vehicle in the garage 10 years ago and wanted it. At the time my buddy was not getting rid of it. Well this year he did. I purchased the car and I am now in the process of getting it going. I purchased a P28 with Hondata S300 with boost control. I also purchased an OBD1 distributor, 1000CC Fuel Injector Clinic Saturated Injectors 12.3 ohm. A Borg Warner S300SX Turbo with a 44mm Tial wastegate. I did the rear brake swap with the integra trailing arms and rear disc brakes, as well as the brake cylinder. I purchased a monotech tuck harness and put it in. When I installed everything I blew multiple capacitors on this expensive ECU. So I had to send it back to get it fixed. IACV circuit is burned, One of the injector driver sets is burned, and the VTEC output circuit is burned. So my question is do I put my cabin harness back to original dpfi, or do I do the conversion to mpfi. I do not want to mess anything up again on this. Any help advice, suggestions are needed and welcome. Thank you all in advance.

 

Off the top of my head, to convert to MPFI, you need to change the TPS wiring and run signal and ground wires to the injectors. If you are running aftermarket high impedance injectors, you need to remove the injector resister box. This may be why it fried the ECU if it wasn't removed. Why would you convert back to DPFI when the engine will not support it?

Regardless, get a wiring pinout, print it out and test every single connection between the ECU plugs and connectors. This will take time but is the only way to verify that everything is correct. The amount of times I have seen hack job wiring both in old projects and "new" harnesses leads me to never trust someone else's wiring.

 

I converted it back just so I know all the wires are the way they would have been. Now I have an obd0 to obd1 jumper harness. I am guess I'll just follow those directions and see where it takes me. This is supposed to be a son and me project. He is not interested at all in this fun wiring part and to be honest it's getting old to me too.

 

If you wanna ditch the wiring I’d suggest getting a rywire harness it’s all plug and play very easy to install labels all the plugs and everything plugs straight into the ecu