So I have a 1997 Honda Prelude & I blew my engine last April I found another H22A it has compression & spark but now it won’t start and everything is connected correctly. I currently have a type SH ECU in my prelude. Would I need to install the original ECU for it to start since it’s a new motor and the ECU doesn’t recognize it??

 

Do you have a flashing green key icon on the instrument cluster ?

 

you could send your ecu to these guys, they will disable the immobilizer.

https://honda-tech.com/forums/honda-...rvice-3381564/

 

If the engine blew, just replace the engine, no need to use the incorrect ECU in your vehicle. Use your original ECU with the replacement engine.