Quote Originally Posted by VTECnique View Post
So to be able to start the engine, you'd need to wire it to the main relay correct? & extra wiring for rpm, speedo?, water temp, fuel gauge?, etc.
main relay gives u ignition switched power to the efi system & power for the fuel pump,so yes, no main relay= def no start

thats the only things that come of the engine harness that need wiring,gauges(not fuel gauge,u just have to wire that to new sender in tank,if new tank used),reverse lights,fan control.
if u go EG+ harness,battery on opposite side,redirect alternator feed.

words make it sound daunting,it will make a whole lot more sense once u see it all laid out in front of u.