HighTech RedNeck wrote:is the CAS the trigger for the ignition?
There are four ignitors on the DOHC Turbo.
The ingnitors are powered from the ignition switch through fuse 12 and grounded by the ECM through pins 13 thru 16 - connector B21.
When the ECM opens these lines, the coil pack for the appropriate cylinder will fire.
By CAS do you mean Crank Angle Sensor?
There are three sensors on the turbo engine.
Crank Position Sensor (CPS)
Intake camshaft position sensor (LH & RH)
Exhaust camshaft position sensor (LH & RH)