92 prelude h22a swap with wiring problem - Honda Prelude Forum : Honda Prelude Forums
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Old 09-23-2010, 11:56 AM   #1
xie04167
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92 prelude h22a swap with wiring problem

hi everyone, i just got a h22a engine + tranny with ECM from a 95 prelude, but no wiring harness. we trying to put them into my 92 prelude si. can everyone tell me if i can use my original wire for the h22a? if i can, and what should i do. i also hear 95 lude has OBD2 and mines OBD1 only, so is that mean the connnections of the distributor, injector, etc etc arent different?
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Old 09-23-2010, 12:06 PM   #2
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Originally Posted by xie04167 View Post
hi everyone, i just got a h22a engine + tranny with ECM from a 95 prelude, but no wiring harness. we trying to put them into my 92 prelude si. can everyone tell me if i can use my original wire for the h22a? if i can, and what should i do. i also hear 95 lude has OBD2 and mines OBD1 only, so is that mean the connnections of the distributor, injector, etc etc arent different?
You can use the H23 wireharness for this.. you will have to run a wire for the Vtec to the ECU.. 96+ is OBD2 so you should be ok. I would use the fuel rail/injectors from the H23 since the fuel line on the H22a is on the driver side and since its an American lude it needs to be on the passengar side. Also do you know which ECU you are using? You wont be able to use the H23 ECU you can use an H22 (P13) ECU. Or you can get a P28/P72 chipped with an H22 basemap. Use the H23 dizzy since it has external coil.
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Old 09-23-2010, 01:00 PM   #3
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^^ What he said. Also, you could consider relocating your fuel filter to the center of the firewall, that way you could still use the H22a fuel rail. That's what we did on my 3rd gen H22a swap.
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Old 09-23-2010, 01:04 PM   #4
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You can use the H23 wireharness for this.. you will have to run a wire for the Vtec to the ECU.. 96+ is OBD2 so you should be ok. I would use the fuel rail/injectors from the H23 since the fuel line on the H22a is on the driver side and since its an American lude it needs to be on the passengar side. Also do you know which ECU you are using? You wont be able to use the H23 ECU you can use an H22 (P13) ECU. Or you can get a P28/P72 chipped with an H22 basemap. Use the H23 dizzy since it has external coil.
he needs to use the h22 injectors.
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Old 09-23-2010, 01:18 PM   #5
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ya listen to the above except you have to use the h22 injectors...ur car would run like crap running h23. the h22 are bigger.
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Old 09-23-2010, 01:39 PM   #6
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Im sure everyone else is right on this but ive read that people have used H23 injectors... But just use the H22 to be safe and all should go well.
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Old 09-23-2010, 02:12 PM   #7
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Im sure everyone else is right on this but ive read that people have used H23 injectors... But just use the H22 to be safe and all should go well.
im sure they have, but the p13 ecu is not programmed to run the smaller injectors of the h23
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Old 09-23-2010, 09:19 PM   #8
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in order for you to use the h23a1 injector u need to use the p14 ecu
i dont think you would want that beats the whole purpose of the h22 swap.lol
if you try h23 injector into the p13 it will bogg .trust me know
definitely use the h22 injector
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Old 09-25-2010, 10:23 PM   #9
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i pullled all trany, engine and ECU from a 95 prelude SRV, so i think i have the H22a ECU. also im not really sure i what type of injectors i have coz the last owner swaped a F22B DOHC in it. as what u guys said, i needed to run few wires from ECU to VTEC soleniod and use the h22a injectors? and the dizzy on my car?
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Old 09-26-2010, 12:53 AM   #10
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Yes, H22 Injectors, H22 Dizzy, H22 ECU, and add those wires in. Just make sure you get the 345cc injectors and not H23 injectors. You should be set.

Like mentioned above, 92-95 Preludes are OBD1 while 96-01 are OBD2s here in the US. But, the JDM 96 Prelude is a OBD1 in Japan. How do I know that? cause my '96 JDM H22A engine is a OBD1 and it doesn't have a CKP on the oil pump like OBD2 engines and instead its inside the dizzy. Same goes to my bro's '96 JDM GSR engine; it's OBD1 with CKP inside the dizzy.
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Old 04-28-2011, 05:44 PM   #11
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i having trouble with my swap

92 lude with a 98 h22a swap

no speedo
no vtec
an no steady idle...

what could of been wrong with wiring?
anyone kno??


please help!
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Old 04-29-2011, 08:48 AM   #12
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Well no speedometer and no vtec, can probably both trace back to the Vehicle Speed Sensor, on the rear of the transmission. It should throw a check engine light as well.

Idle speed could be many things, there is a great thread on honda tech about idle surge, which should help you.
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