[decollect]

'93 LX 2.3 dual spark, dual coil, weird problem. Tach only reads about half value ie: 2500 rpm reads 1250 or so. Check Engine light is on. Steps taken to correct: Found there is no spark coming from front coil plugs for cyl's 1 & 4. Thinking was faulty coil, replaced. Problem still exists. Found is pre OBDII so have not taken to shop for diagnosis yet. Question. does the crank positioning sensor have sensors for BOTH coils separately ie: 8 magnets? Or do both plugs for each cylinder fire simultaneously from 1 impulse to both coils? Could it be CPS or would this be an ECM issue?
Thanks in advance.