1991 Crx HF Engine swap help

 
Old 04-24-2019, 05:19 PM
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Default 1991 Crx HF Engine swap help

Hello I have researched alot of threads and am coming up blank with this particular situation.

We have a 5 speed 1991 Honda CRX HF with a blown D15B6 non vtec. I purchased a D15b Dual Stage vtec JDM engine from ebay aswell as the below listed parts. But nothing is matching up. Only 2 plugs from the harness go into the ECU and we have multiple plugs left over that do not match up with the engine. Can anyone shed some help / parts list of what we need and where we went wrong it would be greatly appreciated.

If i missed a thread that contains this info I am sorry, i know it can be frustrating when a person signs up and asks something thats already been answered multiple times, i did spend time researching it and most threads i found were for the Vtec-e engine.




96-00 HONDA CIVIC 1.5L 4-CYL OBD2 SOHC DUAL STAGE VTEC ENGINE D15B
1999-2000 Honda Civic Ex Engine Wiring Harness VTEC MT 5 Speed OBD2B EK OEM
99-00 HONDA CIVIC MT ECM ECU COMPUTER 37820-P2P-A12.CIVIC 00 Electronic Control Module; (RH front kick panel), SOHC, VTEC, MT
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Old 04-27-2019, 02:35 PM
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Default Re: 1991 Crx HF Engine swap help

pop the wires out of these connectors on your old harness and swap them onto your new harness then buy a jumper harness for the ecu.

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Old 04-27-2019, 07:57 PM
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Default Re: 1991 Crx HF Engine swap help

Originally Posted by Efmysedan View Post
pop the wires out of these connectors on your old harness and swap them onto your new harness
just swap them in random places?
i feel like theres alot of info thats missing here
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Old 04-30-2019, 12:02 PM
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Default Re: 1991 Crx HF Engine swap help

Originally Posted by Marcos Barrios View Post
just swap them in random places?
i feel like theres alot of info thats missing here
i was expecting him to come back and ask how to get the wires out or ask me what I even mean. lol before we all got around to helping him with what wires go where
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Old 05-02-2019, 08:49 AM
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Default Re: 1991 Crx HF Engine swap help

You need to use the original HF engine harness that came on the car and make the necessary wiring changes to it, like distributor connectors, cooling fan switch, etc. The HF harness has the white wire for the igniter in the driver's side firewall connector, not on the passenger side connector like most other MPFI harnesses. The injector wiring is a separate little harness that is taped into the engine wiring harness. Open up the harness and you can replace the OBD0 injector wiring with OBD1/OBD2 injector wiring. You would also need the ECU jumper harness.
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Old 05-02-2019, 11:51 AM
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Default Re: 1991 Crx HF Engine swap help

Oh yea my bad your connectors may not look like mine but get this somebefore me swapped the 8 pin connectors that you have for these.
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Old 07-11-2019, 06:19 PM
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Default Re: 1991 Crx HF Engine swap help

Sorry i got shipped off for work and only just got back around to having an internet connection. I did get the rywire plugs that another person said i needed that go into the ECU. About to start back on this over the weekend. So its really just splicing wires around? i understand that i would not be able to use the dual stage vtec and instead its going to be single. Anything else i would need to know? already have the transmission etc.
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