Quote:
Originally Posted by Reanimotion
Generally yes,
the primary failure is on the ignition coil output, which overloads and destroys itself.
The Ignition transistor fails in two ways, it either goes open circuit, like a blown fuse, and simply stops the spark from working or it shorts out and then kills the rest of the EZ69 by letting 12 volts run around all over the boards inside.
The 01 EZ69 I have here seems to have a different fault where the temperature sensor input has failed. So although it is still working, the timing has gone into an engine overheat temperature limp mode for safety. ( the 3K one on eBay a little while back)
Intermittent faults are logically possible now that the units are 30+ years old, and I've run across some chatter that suggests it's happening. I also have a rare Mercedes 24valve one here that may fall in that category but we've not had a chance yet to look at it properly.
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Besides the key factor of its being a bad design, i.e. a hybrid circuit, and installed in the engine compartment, it's failure was predictable.