Crank angle sensor? Or crank angle sensor plug? I've heard of the pins/wires breaking inside the plug.
Edit:
Straight from wikipedia (I've never had to deal with a faulty CAS but it sounds similar to your problem):
"A bad crank position sensor can worsen the way the engine idles, the pistons fire, or the acceleration behavior. If the engine is revved up with a bad or faulty sensor, it may cause misfiring, motor vibration or backfires. Accelerating might be hesitant, and abnormal shaking during engine idle might occur. In the worst case the car may not start."
Also this is Trev's plug repair guide:
http://www.ae86drivi...ge-Dizzy-Wiring