today i was driving home from school and while driving at any speed my afc neo reads teh battery voltage, its at 13.9v-14.1v which is right where it should be. now while stopped at a red light it read 12.2v-12.4v . the cars not acting up or anything. is their is a problem with my alternator or battery? this is the first time it has happened to me.

 

Thats completely normal. Nothing is wrong.

 

well think about it. your engine is spinning slower so your alt is spinning slower. obviously you're gonna have a lower voltage. if you want it to be consistent, might want to consider the big3 upgrade.

 

but this has never happened to me before. i have a sound system with a capacitor
rp_guy- whats the big3 upgrade?

 

Or have you never noticed? It should drop some at idle. Mine is/has always been in the 13.8-9 range driving idling its 12.4 just like yours.

 

alright than i guess its normal, id just guess that for last 6 months that i had the neo id notice it, i guess not.

 

http://www.the12volt.com/installbay/...TID~73496~PN~1

IMO everyone should do it. there's some posts in the audio/video section here too of a TSX's idle voltage that went from 11-12v just from the big 3