Ok So here's this issue my HT peeps
i have a 91 Ef hatch that was set up for dual point injection and the motor was swapped to a d15b1 with z6 head and a chipped P28 ecu. now i just bought this car, yes collecting someone else's mess lol But i'm looking to do a vitara build or an ls turbo here, but, i would like to get this car running. But i want some help to try and solve this problem and i'll upload some pics if i can. Now i've actually bugged out alot of things! At first it wouldnt even turn over, found out is had a bad ground, Then the spark plugs were bad so swapped those out and then i wasnt getting fuel so i played with the fuel pump and got that to work but i wasnt getting power to 2 of my injectors. So now i have fuel and spark and the engine does turn over but not all of the injectors have power! Injectors 1 and 3 to be exact. So tonight I went through the conversion steps from injectors down to ecu. injectors to res. box is good and from injectors down through obo0 harness is good. So i tested the injectors to see if it was getting power, and come to find out two injectors were not getting power. So went to the ecu and looked at the harness, and A3 and A7 were missing the wires from the conversion harness! From A3 and A7 on the ECU end of the harness, the wires actually go to the B plug.. ??? So on the harness side of the jumper, A3 and A7 are missing. And on the ECU side the wires are in A3 and A7 but instead of going into the A slots, thew run off to the B slots?? My question is now, is the harness suppose to be this way? And if i try to re-wire this, which wires are for what on the jumper harness? After that i believe all bugs she be worked out and should start.. Help?

 

a3 and a7 powers the 2 injectors that ur not getting power to......pin thoes 2 slots on the ecu plugs of wire harness and run wire to the 2 injectors thats not getting power

a3 goes to inj # 2
a7 goes to inj #4

obd0 and obd1 are pinned differently so thats why on the obd1 side of ur conversion harness the wires go to different spots

 

Hears a link I made for doing a mpfi swap https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/diy-dpfi-mpfi-swap-made-easy-2889205/ that should help you out

 

Perfect! I ended up re wiring the whole harness lol That ebay harness did'nt have wires going to the right slots at all but that did fix my problem! although the headgasket was blown. so now gotta change that.