Ok......so i just got a 0bd2 b18b1 for my 91 crx base its a d16b2 still carbed.....i know i need to do the mpfi swap.........and then im going to go with a ys1 tranny....i want to run 0bd1 so i know i need the harness adapters from 0bd0 to obd1 for the ecu but what do i do for the engine harness....do i install a obd2-obd0 adapter? and if so where can i get it........i am going with the hasport mounts and da axles.......what else do i need and please be specific......and if ur gunna tell me to search it up somewhere else go to hell......i did look it up but cant find the info i need.....thanks guys.......

 

from what i remember there are only a couple of sensors that can be swapped out and your block will be OBD1.

get the obd1 ecu jumper, and then i believe you can get the obd2-obd1 stepdown harness for the engine harness.

either way you are going to have to modify your stock DPFI to MPFI, and run the necessary wires.

 

it doesnt matter what obd your motor is. swap your original engine harness onto your new motor and add the 4 wires for the mpfi conversion. 2 for the injectors and 2 for the distributor. dont forget to swap the wires on the TPS. extend the wires for the fan switch from the back of the block to the thermostat. after the wiring has been modified all you would need is the obd conversion from obd0 to obd1.

 

if i do go with the obd1 sensors on the block what do i do with the head harness....how will that work.....

 

you wont be using the harness that came with the engine. dont throw it away though because you may need them for the injector clips and distributor plug and the fan switch and o2 sensor.

 

So my d16 engine harness plugs in to my b18? and wat is the TPS?

 

that is correct. most of the plugs will hook up to the new motor. there are a few that you will have to add such as 2 injectors, 2 wires for the distributor, 4 wires for the o2 sensor, and 1 plug for the fan switch.

the TPS is the throttle position sensor which is located behind the throttle body. you have to swap the wires on the 2 outer pins since you said your car is originally dpfi. the tps on the dpfi turns the opposite direction than the mpfi.

 

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

here is the link to the faq section. if you look under the d series section you should find a dpfi to mpfi conversion. there are links that should be able to help you out.

 

http://www.b20vtec.com/forums/techni...-diagrams.html



here is the one i am using! helps alot

 

K THANKS GUYS ILL POST LATER ON IF I HAVE MORE QUESTIONS