kylesmith3251

i have a 94 civic with a stock d15 in it now i bought a b18a1 just got a pr4 ecu i need to know about what to do with all the wiring like if i need a new wiring harness for that motor or what?

94EG8

You can't use a PR4, you can either get an OBD1 P74/P75 or chip a P06 originally meant for a D15B7. Reuse your stock engine harness, you will need to get an OBD1 distributor and injectors if its an OBD0 B18A1 ('90 - '91 version)

Nbboy7

iTrader: (5)

If the motor obd1 just use the same harness.

kylesmith3251

my motors obd0 everybody has told me pr4 is the ecu i need

94EG8

You made a poor choice for an engine swap. And you were misinformed on the ECU. An OBD0 ECU Does not plug in to the civic underdash harness an OBD1 or even OBD2 B18B1 (if it had the integra engine harness) would have been a much better choice.

kylesmith3251

so if i can get the integra wiring harness will it all work

kylesmith3251

or if i just get a p72 ecu and a obd1 distributor will it all work with my wiring harness

EFRue57

no........listen to what everyone is telling you. you NEED an obd1 integra ecu and an obd1 integra distributor and use your stock engine harness. the integra harness WILL NOT work with your car.

kylesmith3251

so a obd1 distributor with a p75 obd1 ecu is the way to go for what i got

94EG8

I don't think you fully understand just whats involved with swapping the underdash harness, you need to remove everything on the inside of the firewall to remove the underdash harness, dash, steering column, pedals, heater core, blower motor, A/C evaportator core, all of it must come out to remove the under dash harness, and as if that wasn't bad enough you wont have working gauges, unless you feel like trying get a '90 - '93 integra cluster to fit in the dash. Its just a wiring nightmare. As opposed to buying an OBD1 ECU that actually plugs in like its supposed to. Again, from a wiring standpoint you will need the following:
-OBD1 ECU (P74/P75/chipped P06)
-OBD1 Distributor
-OBD1 Injectors

94EG8

Yes, again you also need the OBD1 injectors.

kylesmith3251

will the injectors off my 1.5 work

94EG8

To an extent. It will run, but it will run lean. Used OBD1 B18 injectors shouldn't really cost that much if you look around.

kylesmith3251

i have a p06 ecu in the car now u kno what chip or whatever so it will run with that ecu