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89AccordLxii
08-04-2017, 09:13 AM
Hi all,

As the title states, I'm doing the conversion from auto to manual. My question is do I need to change the wiring harness coming through the firewall and under the carpet? Or could I just plug in the manual ECU into the existing wiring in the automatic?

InAccordance
08-04-2017, 11:40 PM
From what I remember (keep in mind the only fuel injected a-series I had is a prelude), the ecu doesn't control anything on the transmission. Trans is cable actuated. Only thing ECU really does on these cars is control the fuel, even the distributor is mechanical (vacuum advanced).

89AccordLxii
08-05-2017, 09:13 AM
From what I remember (keep in mind the only fuel injected a-series I had is a prelude), the ecu doesn't control anything on the transmission. Trans is cable actuated. Only thing ECU really does on these cars is control the fuel, even the distributor is mechanical (vacuum advanced).
Thank you! That's good to know.

Shane86
08-05-2017, 10:32 AM
Only things you may have to worry about is the wiring for the neutral safety switch I think there is a write-up about it

89AccordLxii
08-05-2017, 01:47 PM
Only things you may have to worry about is the wiring for the neutral safety switch I think there is a write-up about it

Could you please elaborate on this? I couldn't find the post about it. Thanks.

Shane86
08-05-2017, 01:54 PM
Could you please elaborate on this? I couldn't find the post about it. Thanks.

I may be wrong but I think dr snooz has a write-up about it or knows more about it

Shane86
08-05-2017, 02:23 PM
Could you please elaborate on this? I couldn't find the post about it. Thanks.

Check out the thread (convert from automatic to manual transmission) it talks about jumping the neutral, Drive ,Park wires or the thread (doing auto-maual convention soon)

Shane86
08-05-2017, 06:16 PM
Are you switching to a 5 speed gauge cluster

89AccordLxii
08-06-2017, 05:57 PM
Are you switching to a 5 speed gauge cluster

Yes I am.

Dr_Snooz
08-16-2017, 05:52 PM
Here you go: https://www.3geez.com/forum/how/102-convert-automatic-manual-transmission.html

Shane86
08-16-2017, 06:06 PM
Here you go: https://www.3geez.com/forum/how/102-convert-automatic-manual-transmission.html

Yep that's the one great write-up lot of info