How do you check your cam angle sensor (cas)

[odormat000]

Does anyone know how to tell if your CAS is broken? my cylinders 1 and 2 aren't firing and someone told me it might be my CAS but idk how to tell if it's broken before finding a new one. any help? (please don't tell me it might not be my CAS because i've narrowed it down to that and the ECU)

 

[HIGHPSI4]

Leave the CAS hooked up, turn ignition to run (with out the car running) and the CAS pulled off the head. You can rotate the drive blade and hear the injectors and plugs fire. If they do not fire properly try another CAS.