yellow wire pulled off of the starter relay to disable the starter. A helper holding the key to "crank". You under the hood dragging the male tip of the body half of the pickup connector across the intake while holding the secondary coil wire 1/4" from ground. if it sparks the pickup is open or its 2 wire connector is open or the gap is way too far open. then with a jumper wire with alligator clips do the coil test same way (key held to start/starter disabled/coil wire 1/4" away from ground) and tap tap tap the alligator clip to ground. I would clean the ECU bottom side just to confirm a good ground but at this point in time I am leaning toward the ECU but yes I would do the tests.