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Wiring Ecu
- Thread starter civic_01
- Start date
- Replies 2
- Views 798
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hello guys im having trouble putting an ecu from 99-00 civic si into a 91 civic
yea you are. in fact, its impossible unless you do a shit load of wiring. Your car is OBD 0, and the ECU you're trying to use is OBD 2. Why would you wanna use that ECU anyways??? I don't even know if they do make jumpers for OBD 0 to 2, or even 1. im not saying that they don't, but im just not sure.
AllMotorMonster
Senior Member
There is no benefit to even attempt to wire OBD2 into a OBD0 car. In fact, it's a huge waste of time and money.
But, if you really want to do this, you'll need to buy a OBD2 (99-00) Civic Si HELMS manual, and a 88-91 (your car here) HELMS manual and match the wiring up.
I know for a fact, you'll need to add the following wire(s):
Extra 02 sensor wires (primary and secondary)
Knock Sensor
Vtec Pressure Switch
Vtec Solenoid
Crank Fluctuation Sensor
Distributor
MIL (Check Engine Light on Dash)
OBD2 Diagnostic Port
OBD2 Self Diag port (2 wires)
Vehicle Speed Sensor
Good luck with your endevour
But, if you really want to do this, you'll need to buy a OBD2 (99-00) Civic Si HELMS manual, and a 88-91 (your car here) HELMS manual and match the wiring up.
I know for a fact, you'll need to add the following wire(s):
Extra 02 sensor wires (primary and secondary)
Knock Sensor
Vtec Pressure Switch
Vtec Solenoid
Crank Fluctuation Sensor
Distributor
MIL (Check Engine Light on Dash)
OBD2 Diagnostic Port
OBD2 Self Diag port (2 wires)
Vehicle Speed Sensor
Good luck with your endevour