Rorohohoo

Swapping my 1991 dx with a f20b motor I just need pointers for the mpfi swap, is it basically the same as any other motor?

h22god

I'm not sure if the engine you have is OBD1 or 2.

You convert the car to OBD1, use a OBD0 to OBD1 ECU jumper harness, buy a vtec subharness if the pigtails provided with the jumper harness are not long enough to reach the corresponding sensors. Use the engine harness that came with the car and cut/extend wires that don't reach on the F20B. Buy a OBDO to OBD1 distributor conversion harness or wire it yourself. You may also need to use a resistor box for the fuel injectors (make sure the ecu is programed for independence / saturated). And use a wiring diagram online for the resistor box mod.

I think that's it for the wiring...

Rorohohoo

Engine is obd1 l, but since I'm using obd1 injectors do I still need a resistor box?

Joe Yaerrd

When I did my swap 91 civic 4d I used 0bd1 injectors and ran linked one of the wires from each injector to a15 on my pm6

ThefirstPACT

not trying to be a dick, but have you researched this at all? You're asking questions that would be answered with the slightest bit of research.

While I feel pretty comfortable saying, "if you are asking this stuff, you shouldn't be doing the swap". I will give you this advice....buy a Rywire harness and save yourself the trouble.

Rorohohoo

Hard to find anyone that has done this swap with obd1 injectors

ThefirstPACT

Has nothing to do with "obd 1 injectors" are they peak and hold or saturated. That's all that matters.

Rorohohoo

Someone already made the car mpfi but hacked at the harness so bad it runs like complete ****, currently there is no resistor box

h22god

My very first post answered everything to make it run. If the harness is fucked buy another MPFI harness and start at with what I said. It will be wired correctly then. I wouldn't drag this thread out anymore or this people are going to start flaming you.