Been a while since I've been able to play with my accord, due to a VW diesel truck coming into my life, but I've made a bunch of progress on my rebuild of my poor hatch over the last few weeks.
One of these things has been swapping in the wiring and bits from an LXI and installing a Speeduino ECU.
I thought it would be helpful to create a post here to share tip/tricks/advice on converting our cars to a bit more modern EFI cheaply.
1986 Accord CA5 Hatchback (DX)
Transmission 5 speed (E2Q5)
Engine A18A from JDM Accord (single downdraft carb)
Intake manifold USDM 87 accord LXi A20A3
Ignition coil: VW Golf 2.0L (2000) (still working on find coil side boots & plugs to make plug wires to support this....)
ECU: Speeduino UA4C (Fish Dog) ECU w/ a pigtail from SpeedyEFI. Hard spliced in but maybe official speeduino v0.4 and DCWerx's SS-OBD1 and a jumper harness (OBD0 to OBD1) maybe will make more sense for you...
MAP sensor: GM 1 bar
Harness: USDM 1987 LXi sedan (also where many parts have come from)
My a20a3 had smashed dizzy from carelessness pulling the donor engine
Like good hacker, I made one from many... I plan to remove cap & button and make a flush lid..
Don't do that.. It is waste of time.. Use A20A3 distributor and a VERY tiny bit of RTV. Only one bolt will hold it but it is OK.. You ONLY need the VR sensors in the bottom.
ECU Options: HC-06 Bluetooth, DSC (You should use Mini Max A2) VR conditioner, DRV8825 stepper driver
Anyways, I'll post next some useful diagrams and photos for those who might want to do this also.. Bear with me as I try to make it useful!