Hello, I have my 84 Runner SR5 carburetor 4x4 5 speed and I going to do Engine EFI SWAP. I have the completed engine (need rebuild) with all wiring hardness but the ECU is missing. All parts was remove it for a 85 Runner 5 speed tranny. The only part I need is the ECU. OE#89661-35020 i get is part # from 4crawler.com

 

Welcome to Yotatech. I have converted a truck from carb to EFI and hope this will help https://www.yotatech.com/forums/f116...4-88-a-278925/ I think an 86 ECU will interchange as well.