i have a b18a1 i want to convert it to obd1 i have the IM for obd1 i also have the dizzy, alternator,ecu,o2 sensor,and harness. I want to put it in my 1991 sedan DX. I was wondering if thats all i need to make it run in the car. and if i still have to do the DPFI to MPFI conversion or would this automatically do it.

 

you will need to do the DPFI to MPFI
you will need a B-series aftermarket mount kit
you will need a modified shift linkage
you will need 90-93 Integra axles, one left and one right,
buy b series halfshaft

 

and a b series transmission...

 

and an obd0-obd1 conversion harness

 

Your going to have modify ur engine harness to mpfi. Also you will need rear t bracket for rear mount.
Google dpfi to mpfi. Read ur results. This is one of the simplest swaps.

 

I have all the parts for to swap it in, however i do not want to use the stock harness. Can i not just use the LS harness on the b18 and put it in the ef and not worry about the dpfi to mpfi? Since everything will be obd1 and i have everything to run the motor? Its a shell right now, nothing in the engine bay.

 

First off, OBD1 didn't even have DPFI ever... never ever.
So your DPFI setup can not be OBD1.
DPFI to MPFI is literally 12 steps so it's nothing to be intimated by.
It's really easy.
Making Jello is like... 5 steps.
http://www.wikihow.com/Make-Jello

With that aside, yes, you could use the LS engine harness.
However the OBD1 LS harness won't even plug into the firewall connectors.
So for starters, you would have to cut off your firewall connectors and install the correct ones for the LS.

BUT - Even if it did plug in, AND if all the pins on the connector magically matched up to the correct sensor, then you would still have to rewire the firewall to ECU wiring because you would be missing 4 wires MPFI has that simply do not exist on the DPFI harnesses.
2 wires that go to the distributor and 2 for the injectors.

This isn't the case though - not only are you missing 4 wires, but the DPFI ECU pinout is slightly different than the MPFI so a few locations are mixed up.


.... you need to do a DPFI to MPFI conversion no matter what.




.

 

unfortunately you cant just use your obd1 b18 engine harness. it wont plug up to the cabin harness. so your going to have to modify your dpfi engine harness to a mpfi engine harness. once you get that done you can convert it to obd1. heres some links check them out they will walk you though the conversion.


http://www.angelfire.com/d20/hcivic88/dx-siwiring.html

also some diagrams to help you out. a obd0 pinout this will show you were the wires are located on each connector.

second pic is the distributor plug dx to si dizzy plug. you will need the male end of the si dizzy plug for your engine harness. if you have any other questions just pm me.

 

Take it one step at a time. First and foremost you will need to convert your car to MPFI.


I can make you a complete plug n play harness for your car. No headaches on your end, literally plug n play. Check my sig for pics of my work. I had some on eBay but those have since been sold.

 

Ok cool thanks for the info