stevieturbos

i have a 90 civic standard model...i have a mini me setup which is obd1..i need to figure out what wiring i needed to convert my std civic to obd1...is there a write up on it? the ones i find are not in depth about this swap....i mean should i convert to mpfi first and then convert to obd1? need help thanks!!!!

placid888

i would rather convert it to mpfi, stick with obd0, get an pm6 ecu, then convert it to obd1 later on, just get an obd0 to obd1 harness, with obd0 have a vafc to control vtec or a shift light to kicks in the vtec

stevieturbos

c thats the thing is im using a hondata s300 p28..its a turbo build so i need to go to obd1 but what i need o know is should i convert to mpfi with the si harness and then convert to obd1 or can i use my dpfi std harness and then convert to obd1 without using the si harness...confusing but hope someone understands..thanks

4drEF

You had it right the first time.
Convert to MPFI and then to OBD1.

In your second post you seem to have gotten off track.
You don't use the Si harness at all unless you are up for a wiring nightmare.
Stick to using the DPFI harness and converting it.

chadr111

Here's a related thread that leaves some questions unanswered.
https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/dpfi-mpfi-obdi-using-obdi-injectors-no-resistor-2253893/

another.
https://honda-tech.com/forums/all-motor-naturally-aspirated-44/obd0-dpfi-obd1-mpfi-2641174/

And a pretty good write up here. (if it's accurate)
http://crxcommunity.com/viewtopic.ph...0caa4d26c5d7fa

stevieturbos

thank you for the link chadr...and for the nfo 4dr...so from wat u guys say and wat i read i CAN use my dx harness? and just wire to obd1 using that harness correct? i no i need the jumper but the wiring is done with the dx? and not the si?sorry i just dont wanna start wiring and it not work lol...

97 ek coupe

yeah bloomslang sells a dp to mpfi, and obo to obd1 for like 150

stevieturbos

yea i was gonna do that but i have an si harness the stock harness and an obd1 vtec harness to make it work and i no i can without spending money u no...but i think i got it thanks

97 ek coupe

yeah you can just wire in the two injectors and make it work