Cam sensor only helps the engine start. After that it's not used according to what I read in the FSM. Crank sensor tells the pcm/icm when to fire each coil. That's the one I'd go after.

Cam sensor, located down and to the left of thw WP pulley. Held in by one 10mm bolt (IIRC). Wiggles out, wiggles in, done.