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cooper · 07-26-2003, 11:38 PM

i have a 93 civic ex and also a 01 obd2 gsr motor. the motor is already bolted in and ready to be wired. should i use the stock ex p28 ecu or use the obd2 p72 ecu that came with the motor. do i need to use the obd2 gsr wire harness or is there a way to make the ex harness work.

AllMotorMonster · 07-27-2003, 02:59 AM

The 01 GSR engine harness will plug right in.

You will however need to add:
Knock Sensor wires
IAB wires
Tach wire (factory tach will not work)

Now, you have to ask yourself?

Do I want IAB control?
Yes= P72 OBD1 ecu
No= P28 OBD1 ecu converted to DOHC specs

cooper · 07-28-2003, 04:58 PM

the whole harness in side the car all matches up?

crxboi · 08-20-2006, 01:12 PM

Okay, I am doing something similiar to my 95 civic sedan. I have a 99 USDM B18C1 Engine, S80 Tranny, and the OBD2 ECU (dunno yet what model). Do i need to purchase a OBD1 GSR ECU? and what model should I get? I want the motor all stock (xcpt for normal bolt-ons). Does anyone have one that I could buy? Mahalo!

pissedoffsol · 08-21-2006, 12:22 AM

need to, no... but its a lot easier IMO. plus obd1 rocks obd2.

i'd try to pick up an obd1 p72 ecu.
keep in mind you need to swap the iab control.
obd2 b18c1 into a 5th gen civic

crxboi · 08-21-2006, 01:28 AM

okay, stupid question, BUT what is a IAB? I am pretty new to the whole motor swap between different gens. Thanks!

pissedoffsol · 08-21-2006, 11:17 AM

secondary intake air butterflies in the GSR intake manifold.

crxboi · 08-21-2006, 01:44 PM

Thanks sol, Keep me in mind since I just got my engine, trans, axles, and the wire harness from that donor car. The guy who I am buying it from didnt have the OBD2 ECU so I dont know what model I have but, if anyone wants to swap OBD2 for a OBD1, I am game!!

mathematics375 · 09-01-2008, 11:05 AM

I'm looking for a obd2 96-98 civic engine wiring harness, can anybody help?

George777 · 09-01-2008, 11:11 AM

Check the date on the thread, man. Just start a new one.

07-27-2003, 02:59 AM	#2
AllMotorMonster Senior Member Join Date: Oct 2002 Location: Inland Empire foo! Posts: 542 iTrader: 0 / 0% Rep Power: 20	The 01 GSR engine harness will plug right in. You will however need to add: Knock Sensor wires IAB wires Tach wire (factory tach will not work) Now, you have to ask yourself? Do I want IAB control? Yes= P72 OBD1 ecu No= P28 OBD1 ecu converted to DOHC specs __________________ <a href=\'http://www.ask.com\' target=\'_blank\'>Learn everything you ever wanted to know about engine building, chassis setup and ECU's</a>

09-01-2008, 11:05 AM	#9
mathematics375 Junior Member Join Date: Sep 2008 Posts: 1 iTrader: 0 / 0% Rep Power: 0	obd2 96-98 wiring harness I'm looking for a obd2 96-98 civic engine wiring harness, can anybody help?

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07-26-2003, 11:38 PM	#1
cooper Junior Member Join Date: Jul 2003 Posts: 12 iTrader: 0 / 0% Rep Power: 13	i have a 93 civic ex and also a 01 obd2 gsr motor. the motor is already bolted in and ready to be wired. should i use the stock ex p28 ecu or use the obd2 p72 ecu that came with the motor. do i need to use the obd2 gsr wire harness or is there a way to make the ex harness work.

07-28-2003, 04:58 PM	#3
cooper Junior Member Join Date: Jul 2003 Posts: 12 iTrader: 0 / 0% Rep Power: 13	the whole harness in side the car all matches up?

08-20-2006, 01:12 PM	#4
crxboi Junior Member Join Date: Apr 2004 Posts: 25 iTrader: 0 / 0% Rep Power: 12	Okay, I am doing something similiar to my 95 civic sedan. I have a 99 USDM B18C1 Engine, S80 Tranny, and the OBD2 ECU (dunno yet what model). Do i need to purchase a OBD1 GSR ECU? and what model should I get? I want the motor all stock (xcpt for normal bolt-ons). Does anyone have one that I could buy? Mahalo!

08-21-2006, 12:22 AM	#5
pissedoffsol RETIRED Join Date: Sep 2002 Location: Retirement Home Age: 29 Posts: 49,951 iTrader: 2 / 100% Ride: Electric Scooter Blog Entries: 1 Rep Power: 531	need to, no... but its a lot easier IMO. plus obd1 rocks obd2. i'd try to pick up an obd1 p72 ecu. keep in mind you need to swap the iab control. obd2 b18c1 into a 5th gen civic

08-21-2006, 01:28 AM	#6
crxboi Junior Member Join Date: Apr 2004 Posts: 25 iTrader: 0 / 0% Rep Power: 12	okay, stupid question, BUT what is a IAB? I am pretty new to the whole motor swap between different gens. Thanks!

08-21-2006, 11:17 AM	#7
pissedoffsol RETIRED Join Date: Sep 2002 Location: Retirement Home Age: 29 Posts: 49,951 iTrader: 2 / 100% Ride: Electric Scooter Blog Entries: 1 Rep Power: 531	secondary intake air butterflies in the GSR intake manifold.

08-21-2006, 01:44 PM	#8
crxboi Junior Member Join Date: Apr 2004 Posts: 25 iTrader: 0 / 0% Rep Power: 12	Thanks sol, Keep me in mind since I just got my engine, trans, axles, and the wire harness from that donor car. The guy who I am buying it from didnt have the OBD2 ECU so I dont know what model I have but, if anyone wants to swap OBD2 for a OBD1, I am game!!

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obd2 wiring harness or eg ex civic harness