ok to start i have a 1989 yj with the 4cyl
i have cleaned the injector
replaced fuel pump
fuel filter and that little sock thing on the pump
ive checked the relay it checked out.
this is where im lost if i skip the ECU and run a wire from that slot on the relay to ground the pump runs if i reconecet that wire to the ECU and turn the key to run the pump kicks on but only for about half a second then right back off