OBD1 H22a into OBD2a civic swap.
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Joined: Jun 2005
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From: Huddersfield, England, England
OBD1 H22a into OBD2a civic swap.
Im using an OBD1 engine and ecu from a prelude (H22a)
My car is a non v-tec civic currently using OBD2a.
If I use a conversion harness so I can plug in my OBD1 ecu will it work?
Can I just modify the connecters on the OBD2a engine harness to match the OBD1 engine and ecu.
Im guessing Ill have to add the sensors for the vtec and knock.
What else am I missing? It cant be that easy?
My car is a non v-tec civic currently using OBD2a.
If I use a conversion harness so I can plug in my OBD1 ecu will it work?
Can I just modify the connecters on the OBD2a engine harness to match the OBD1 engine and ecu.
Im guessing Ill have to add the sensors for the vtec and knock.
What else am I missing? It cant be that easy?
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Joined: Apr 2003
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From: socaL
Re: OBD1 H22a into OBD2a civic swap. (simon98h22)
none of the plugs on the civic harness will match, you're gonna hafta cut and splice. use prelude plugs on the civic harness and add/extend necessary wires
Joined: Apr 2004
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From: Great White North, Canada
Re: OBD1 H22a into OBD2a civic swap. (BritishBulldog)
I did an OBD1 H22a into a non vtec OBD2 shell.
- I'm pretty sure you can reuse the shell harness and modify as needed.
- Yes a conversion harness will be needed and will work (I don't recommend doing it the long way by manually mapping every wire, it can be done but why bother when you can just plug and play with a coversion harness)
- As mentioned, you'll need to create a new sub harness for anything needed by the new engine/ECU (VTEC, knock sensor etc) and run it back through the firewall to the ECU.
It's pretty straight forward, it's just tedious.
- I'm pretty sure you can reuse the shell harness and modify as needed.
- Yes a conversion harness will be needed and will work (I don't recommend doing it the long way by manually mapping every wire, it can be done but why bother when you can just plug and play with a coversion harness)
- As mentioned, you'll need to create a new sub harness for anything needed by the new engine/ECU (VTEC, knock sensor etc) and run it back through the firewall to the ECU.
It's pretty straight forward, it's just tedious.
Thread Starter
Joined: Jun 2005
Posts: 11
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From: Huddersfield, England, England
Re: OBD1 H22a into OBD2a civic swap. (Fast+Forward)
Whats the best way adapt the harness?
I read somewhere that if I cut the harness, the resistance in the wires could change and affect the readings for the ecu.
Is this true?
I read somewhere that if I cut the harness, the resistance in the wires could change and affect the readings for the ecu.
Is this true?
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Joined: Apr 2003
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From: socaL
Re: OBD1 H22a into OBD2a civic swap. (BritishBulldog)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BritishBulldog »</TD></TR><TR><TD CLASS="quote">Whats the best way adapt the harness?
I read somewhere that if I cut the harness, the resistance in the wires could change and affect the readings for the ecu.
Is this true? </TD></TR></TABLE>
if you solder and shield it well enough from the elements then it shouldn't be a problem. Hasn't been w/ mine for the last couple years.
I read somewhere that if I cut the harness, the resistance in the wires could change and affect the readings for the ecu.
Is this true? </TD></TR></TABLE>
if you solder and shield it well enough from the elements then it shouldn't be a problem. Hasn't been w/ mine for the last couple years.
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