My 240 starts up key turn but after acouple of seconds dies bein told its my wiring harness
Well I would never listen to that person ever again because they are a dumb-ass!
Check to be sure you getting fuel and proper fuel pressure
Check for leaking injector(s)
Check your spark
Check your timing - this also consist of getting the idle adjusted correctly along with the TPS
Just to get you started in the right direction
FSM has it all - but if you need more help just send me an email -
[email protected]