Ferdman, the distributor cap and rotor very much needed to be replaced. I am glad I finally was able to do so.

Bottom hex screw was a challenge to remove because I was not able to insert/lineup allen key, until I figured out to use the long end (instead of the short end, that I used for the top screws). Seems logical, but being my first time doing this it was not apparent at first.

Does the car need to be driven for X miles in order for the the onboard computer to adjust timing? does it build historical information? or is that an instant process, instant adjustment as the car is running?

I recall reading somewhere (a few years ago) something about running the car for 100 miles or so to reset the error codes or something like that (or to generate new codes if they were cleared), not sure if the same is applicable to the EZL module.

When I started the car after replacing the distributor cap/rotor it started rough, but subsequent starts seem smoother.

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89 300E - 240k +