Following recent replacement of my starter and alternator, my ammeter is bouncing like a wild metronome at idle. This didn't exist before the swaps. This is beyond my experience. It appears to calm down somewhat at speed. No other symptoms or complaints with any electrical systems in the Z; everything works as advertised, even the clock keeps perfect time
. Researching the problem I read similar complaints from owners of Cobras, Corvettes, Ferrari, and even aircraft. The only believable response in all of those threads indicates an overloaded diode acting as an internal voltage regulator at the (now new) alternator. (I do use a diode instead of an external regulator). That thread also mentions the needle seems to calm down at speed, but the response was that the frequency of voltage change increased so greatly at high engine speed, the ammeter needle couldn't physically keep up with it and so appeared to be steady.
Has anyone else experienced this problem and, if you did, what siZe magic wand did you hit it with to fix it?
Frank T
Hmm, you might try contacting Mike Winters. He is a wiZ on Z wiring.