E350 ignition coils
I have a fairly new-to-me 1998 Coachman motorhome on a 1997 E350 chassis. At the time I purchased it this past July, it was not running well (check engine light on) and had two bad coils, which were ...
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Very interesting, garyhaupt. Mine never made an abnormal noise (except for that brief, 10-15 second soft valve clatter when started cold), just ran a bit rough and had less power than usual. My mechanic has told me that it's not a big deal to run it with a bad coil, "it will just run like crap." If I ever heard an abnormal noise when the check engine light came on, I would pull over right away. When mine went out, I was about 15 minutes into an hour and a half drive (and would be returning at the end of the day) so I just went ahead and finished the trip. I do wonder, though, if the valve clatter noise leading up to the actual failure was a sign that the coil was operating in a less then optimum way, before it completely failed.
