[sideshow]

some ecus have main earths for ecu
and other earths for injectors
so might be bad earth

check power to injecotrs when cranking
u might have power with ign on then loose it once u goto crank
very very common when people fit new motor to old car
the crank or balast/coil bypass wire might work but not the main power

find the red power wire to injecotrs and splice into it then run other end to pos battery
then try starting it