Hey guys, I'm swapping a USDM H22A into my 1992 Si 4WS. The motor came with a full engine harness, so I have the connectors for the VTEC oil pressure and solenoid already.
My question is whether I still need to do something kinky with the pins and the ECU, or do I just plug everything in and go.
I tried to reason this out by myself, and I just got cross-eyed doing it. The H22 engine harness will hook up to the main harness fine, but I'm just not sure about whether the ECU will receive the signals from the VTEC wires. Any advice?
Do you plan on using the stock Si ECU? I don't think it will support the operation of vtec. You would need an ecu from am H22 prelude. I am not an ECU guru so I don't know the different model numbers for the ecu's. Try searching around. Were there any Prelude models with Vtec and AWS? If so that is probably the one you will want to find and use...
Um, hello thread-jacking? My post is about a USDM H22. Here's what I know for a fact:
I have a USDM H22A1 with full wiring harness (VTEC Solenoid and VTEC Oil Pressure plugs)
I have a USDM P13 ECU
The 4WS is controlled by a separate 4WS ECU in the rear of the car (It's not an issue)
If I understand correctly, the H22 engine wiring harness connects to the main wiring harness (which is from a 1992 Si). Thence, it connects to the P13 ECU.
My question is whether I need to make any modifications to the main wiring harness. Does the main harness of an Si have the appropriate pins to the ECU so that adding the VTEC engine harness will be recognised? Or do I still need to construct something like a subharness for the VTEC plugs?
petern101: look at the JDM H22 swap write-up in the FAQ section. You can't miss it, and it describes, in detail, everything that you need to do for a JDM motor. It doesn't really apply to me, because I'm swapping in a USDM motor.
I will try and clear up a few things. You cannot use the jdm harness without modifying it. It would be better to use the si harness and just wire up the vtec pressure switch and the vtec soilnoid. That would be the easyest way. Your 92 4ws is not prewired for vtec, I pretty much know that becuase my 93 4ws was not prewired. so the vtec harness would not be plug and play, You would still need to modify it and IMO it would be harder than using the si harness and wiring up the 2 wires to the ecu.
1. check to see if my 92 4ws is pre-wired for VTEC (chances are, it won't be)
2. if it is, plug and play.
3. if it isn't, wire VTEC solenoid and VTEC oil pressure to pins A4 and D6 (respectively)
Here's another question. I've blocked off the EGR valve on the new motor, so can I use the pins from wires D19 and D12 to crimp onto the VTEC wires? D19 and D12 are EGR lift valve sensors, which won't be used otherwise (and which are the right sizes for A4 and D6). Will it throw a code? I'd rather not buy another OBDI ECU harness, and I don't really want to do it the "ghetto" way. Any ideas?
lol sorry man.......didn't realize i thought it was a related ? someone could answer along with yours
my bad
btw i did read one of the swap faqs and it didn't give much info but i will continue to further my research.....
again my bad no more posts from me
lol, no worries man; it's cool. I just wanted to make sure that this didn't turn into a "How do I swap my JDM H22?" thread. Good luck with your swap though!
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