05 ford escape 3.0 no spark from 2 coil packs. Swapped in 2 good coils still no spark. What fires the coils?

05 ford escape 3.0 no spark from 2 coil packs. Swapped in 2 good coils still no spark. What fires the coils?

The PCM sends a pulse to the Negative pole on the Coil to fire. It gets the signal from the Crank Sensor. If you have a test light pull the plug and check that there's power to One terminal. If not you need to check the wiring harness, if the other coils are working it's not a fuse or relay.

Most likely a bad crankshaft position sensor. Check for feed voltage and signal voltage on the coils (see youtube videos on coil pack testing). Troubleshoot from the result. Or see a mechanic with a diagnostic machine. You can "throw parts" and try replacing the crankshaft position sensor.