Blrfl
Natural Rider Enhancement
That's actually not surprising. If the engine sputters, the alternator may sputter with it. The meter's probably not what you'd call lab-grade equipment anyway.I have noticed that the Datel meter will sometimes gain 0.1V momentarily immediately following a misfire event, but it's not consistent.
I have a long list of things for you to look at if you had a 'scope available. If we ever do figure out what's causing this, I'll bet good money it's going to be something very short, and that's how you'll ferret it out.I wish when I'd had the oscilloscope on hand that we had looked at the character of the alternator output.
You know, that brings up an interesting question from another thread: what's the condition of the resistors in your spark plugs? If the resistance in one has dropped (not their usual failure mode), ignition noise could be making it back up to the ECM.it's been suggested that if the output looks "hashy" on the scope it could screw with the ECM or be producing interfering RF noise.
--Mark