I was on a road trip started with a ticking sound then got louder, after driving two more hours the ticking went away so I assumed the problem was not valve train related, Is it possible I have something wrong in the valve train yet the valve train is now very quiet. At this time engine is quiet I have a check engine light on engine runs rough, engine runs smoother with coil 1/4 disconnected, have changed ICM and 1/4 coil.
Thanks