topshotta

Ok i have been doing some research on this issues of putting a 99 motor(obd2) in a 92-95 civic ex (obd1).

First option 1 --Using OBD2 LS HARENESS

Some people say that the it will plug right up to my shock tower harness with no issues using the obd2 harness. As for the ecu i could get a obd1 ls (Don't have) or get my p28 (have )chipped (reprogrammed). On the other hand i could use a obd2 ecu (don't have) an get a jumper harnness -obd1 to obd2 (don't have), that will promp me to have to wire up a second o2 sensor (don't want to ).

***Please bear in mind that i don't have the the LS obd2 alternater, but i do have the complete 94 civic ex engine and harness.****

Second option 2 --- using OBD1 92-95 CIVIC EX HARNESS

Since i have a complete d16z6 obd1 harness (motor an distributer no good) i Could use this harness. The civic alternater will no line up on the ls motor, so since i don't have a ls alternator i could just buy an obd1 ls alternator which should plug in with out cutting, but will it line up on the 99 ls motor? I will have to buy an obd1 ls distributer (since my civic 1 is no good) an should plug right up. As for the injectors i would have to cut the obd2 ls injectors wires an wire it up to my obd1 civic harness( don't want to cut). Or on the other hand i see on eday that they are selling obd2 to obd1 conversion injectors wire harness. (Search --Obd2 To Obd1 Conversion Harness Honda Civic Integra) An only cost $30 for all 4. There for there will be less cutting.
As for the ecu i believe i could use my p28 an get it chipped. Will there be any other wires or sensors that i would have to cut or tape off? As for the o2 sensor i would have to cut an extend the wire.

**** Please bear in mind that i'll be doing a LSV in the near future.
**** Trying to cut least wires as possible.

Given the two option an that i want to do a lsv in the future should i use the ls obd2 harness or use my obd1 civic ex harness.
Will there be any other wiring issues that i will run in to also.
Also I'm looking for e complete ls tranny or gsr(tranny, shift linkage, axles, half shaft, starter, mounts, speed sensor) i have cash in hand - please no grinds an no issue , low miles.


Thank you in advance on the advices. both b20 and Honda-tech

94EG8

You can use an OBD1 B-series alternator. Reuse your old OBD1 Z6 injectors (they flow the same as the 1.8L injectors) And either use an OBD1 LS distributor or a conversion harness, or cut and splice, or swap the Z6 CYP/CKP/TDC sensors into your OBD2 LS distributor. With the civic harness you will need to cut and lengthen a couple of wires (IAT sensor for example) using the OBD2 harness you will have to add the wires for vtec, its about the same amount of work either way.

topshotta

thanks for the advice

CleanazzEJ1

I just swapped an ls in my 93 ex and used obd2 engine harness everything plugged right in. I was amazed. Then I ran a p75 obd1 ls ecu no cel's ran strong. Last weekend slapped on a b16 head and only wires I had to cut were the orange vtec wires on the shock tower (mine are tucked) and had to extend the coolant temp sensor now Im ls-v