At idle my battery volt meter swings +/- about 2 steady. Tensioner pulley is new, belt looks fine and not squeeling, not sure what problem is. I have had an instance where I went WOT and car seemed to lose electrical power and mechanical for about a second, but that was just once. The voltage swing is everytime I start the car and remains wether car is cold or hot, volts are steady while driving/under load. Do I need a new part or maybe have an underdrive pulley installed already? I'm not 100% on what mods are installed on it.


PS. I apologize for the multiple postings, I've asked these questions on other forums as well with minimal feedback.

 

Do you have a 40 year old Ford? Because the car in your sig never came with an ammeter.

 

volts then

 

are you 100% sure the belt is fine? any leaks? it sounds like you have some sort of leak on your belt, or the belt is just worn out, and its slipping sometimes

 

over rev can fry the diodes in a stock alternater. mine jumped like that and i replaced it with a 145 amp truck alt. cured.. bolts right in i think its number is like 442 delco parts guy can tell you..