Love the content and the breakdown on things that are a little hard to find information on. I also started a 2jzge swap on my 1977 celica and I’m having pretty much the same issue. I pulled the motor myself out of a running and driving car so I know everything was working. Trying to see if I can get it to run on the factory ECU before breaking down and buy a aftermarket standalone.
Im so excited that I found your channel! Im doing the same swap! I got an 84 4x4 and have an is300 2jzge vvti with complete engine and dash wiring harnesses, ecu and ignition with matching key. I bought the bellhousing i need to bolt up to stock transmission. Im a fabricator by trade so no concerns as far as custom mounts goes. Only thing im hung up on is fuel delivery. How did you set it up and what did you buy to get fuel delivery working? Also, if there's a better way to message you, let me know.