Originally posted by Russell-3L:
at higher rpms my lights dim and the battery light faintly flashes, did it before the 3L, and it still does it now!



Symptoms of a failing voltage regulator.

They can still bench test fine because they never get hot and overly vibrated like when driving.


{side note}
A poor alternator can make you run rich because the ignition system is not firing at it's full capacity.

2000 SVT #674 13.47 @ 102 - All Motor! It was not broke; Yet I fixed it anyway.