Hey im doing a LS/VTEC swap into my 91' SI. I bought the car for 40 dollors and the original motor was taken out as well with the wiring harness. My buddy gave me the harness from his DX(4 speed). This is my first ever swap and im just looking for a little direction? It seems like i have some sensors missing from both the harness and motor??? If anyone has some pics or any advise PLEASE feel free to share. Thank you

 

Cant use the harness from the DX - it won't match the Si interior/chassis plugs.
Rywire has Si harnesses in stock usually. You can also find them on ebay etc...
You're going to need a subharness, if not a OBD1 conversion. Checkout the rywire website, call me for more info.
~ Peter @ Rywire.

 

i have an 91 SI harness now, and unsing CTR injectors if it matters. what i was told was a stock si harness and obd0 ecu i would have to convert the harness, just wire vtech and the injectors