hey HT i wanna know the steps and like things i need to convert my obd0 rex to obd1, if someone could gimme a list of the things i need such as wire converions and what not, thank you

 

Since you are the first one doing this swap, I suggest you take a look at this...

https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/88-91-crx-ef-civic-frequently-asked-questions-faqs-1508680/

 

O2, distributor and ecu.
Ecu jumper and distributor jumper. If you want a full plug n play harness I can make you one. Check out my link below to see pics and video of my work.

 

You need to get whole wires harness OBD1 from Ef Si. You not have get any jumper of distribution etc. You only need get ecu jumper OBD1 to OBD0 and whole shores harness ef si. That what I did to my crx.

 

My head hurts now.
There are NO "OBD1 EF SI" cars. There is an obd1 EG (92-95 civic HB) SI.

You can get the ecu jumper and add in the obd1 components such as:
4 wire o2 sensor
Obd1 distributor
And obd1 ecu

I'm assuming your keeping the stock motor which you will then need the P06 ecu and td41 or td42 distributor. I don't remember which one fits better with least amount of modification.

 

No, you need find out. There is have ef si OBD1 whole wires. I got ef si whole wires harness OBD1. And put on my crx with d16z6 motors OBD1 removed from eg Si and it was sucess work running no problem. It is rare to find ef si OBD1 but there is no wires vtec..you need make wire vtec to ecu.also get jumper ecu OBD0 to OBD1 That it.
Ecu p28 with chips champ. Faster.
That what I did to my crx few months.

 

Use proper grammar. There are no obd1 ED's (what all 88-91 civic/crx chassis are referred to in the US). actual EF's are pre-OBD (OBD0), there are a few late models that were sold in 92 but they are still OBD0. I would love to see pictures of your said obd1 crx harness. Please prove me wrong.

 

I went and put my waders on... it's starting to get deep over here.

"hmonkey86" - you make me laugh.

 

I think you talkin about crx. I am taking about ef si hatchback not crx. Ef hatchback has OBD1 wires harness. get it and put to crx. It would be perfect to used to crx. It cost about $100-120. Not badly.

 

N3va3vaSatisfi3d- why i make you laugh??

 

I know that crx never has obd1 wires harness. Just simply to get ef civic hatchback SI wires harness will be fit to crx. Am I correct or wrong??

 

Woww...^

 

wut?

 

I've tried to say it nicely, but quite frankly your a fraaking idiot. The civic and crx 88-91 are all non obd1. An obd1 civic HB is not an ED/EF chassis code it is considered and EG. And those harnesses will not plug into an 88-91 civic/crx with our modification.

88-91 civic and crx use the same damn harness (in respects of course to sub models such as DX and SI/EX).

 

1.) The way you make sentences...
2.) You are completely wrong on all aspects of your posts...
3.) The 4th generation Civics and 2nd generation CRXs never came in anything BUT OBD-0 in the USDM.

'88-91 = OBD-0
'92-95 = OBD-1
'96+ = OBD-2

"EF"s are CRXs AND Civics... NOT in the USDM though...

Also - just throwing a "chip" in your stock vehicle doesn't make it faster because they dumped fuel all over the map. I hate to break it to you, but the "magic black resistor box" doesn't work either...

 

Wow... Just wow.. If there is a ef/Ed si with a obd1 wiring harness why in the fudgsicle would you need an obd0-obd1 jumper to convert an obd1 wiring harness to obd1? Duhh that's why people are laughing at you

 

just use your stock harness or get and 89_91 si harness get a p28 ecu and find a jumper! rywire.com makes a good one