Make sure that you have the two CAS bolts tightened good. Don't overtighten them, though. Retapping aluminum is a PITA.
What I would do is reset the timing according to the FSM. which will set it back to 15 BTDC.
http://www.store.yahoo.com/pha....html
If the car seems to be farting on you still, I would check the ECU to see if it's posting a faulty CAS code.
Another possibility is that the ignitor is beginning to go out and isn't transmitting a strong enough pulse to the coil packs.
I would try to get ahold of a known working CAS and ignitor and swap them in combinations to see if one of those two are affecting your ignition woes