I doubt you would have an RPM signal with a faulty cps.
Sounds like you have a pinout of the ecm. Maybe you can try and back probe at the ecm connector to look for a switching signal there; rule out an issue in the harness between the ecm and the coils/inj.
Sounds like you have a pinout of the ecm. Maybe you can try and back probe at the ecm connector to look for a switching signal there; rule out an issue in the harness between the ecm and the coils/inj.