Yesturday my car had a check charging system and the battery light was on so i had a guy check it out and he said that my Alternator is turning to slow cause of my underdrive pulleys that i need a new alternator pulley or i could try a high performance alternator what do ya'll think i should do ?

 

Nice car BTW. What electronics are you runnung in the car (Stereo/Amps, etc.)?

 

Nothing just stock shaker 500 radio no other electronics, had an amp and subs but took them out long time ago.

 

probably just your battery, a dead cell causing low voltage battery drops below 11.5 volts all kinds of weird things happen. my taurus lx radio started searching and seeking, seat belt chime going on off electric seat wouldn't work, auto temp going hot and cold took to ford and before i get home they called to pick it up and it was the battery. something similar to limp home mode so car would run.

 

Hmm i duuno what to think LOL..

 

The OEM batteries have been known to be/go bad.
What was the manufacturer and date code on your battery
so I can start keeping data to see if there is a trend with
certain month batteries by a certain manufacturer.
You should not need a better alternator with OEM stock
amperage loads and UnderDrive pullies.
The OEM stock alternator should
keep right up.
But if you must, PAperformance sells nice 6G 200A alternators.