You might start by unhooking all the wire(s) from the coil neg primary terminal & w key on jump this coil terminal to ground,tap tap tap & see if the coil wire held 1/4" from ground sparks. Check that the coil positive pri terminal and the "point" of the ECU plug in connector get fire when the key is turned to "start". You can unhook the brown solenoid wire at the starter relay to keep the starter from cranking until you get this solved