| its hard too tell from what you say in your post.
if you have meter tested the batt while running and its putting 14 - 15v back in then its not the alternator.
check the bat after it has been left for a while or even over night to see what voltage is in it. i.e. is it retaining its charge.
and finally if all the above check out, it sounded to me that what you described as a whirring. would be the starter clutch spinning without engaging. |