charging problem

alright i have looked over alot of stuff, i have the d15b vtec witha pr3 ecu (i know b16a ecu...) with a s-afcII for tuning
the problem is when i put this motor and ecu in (wired up vtec)
the car only charges at 12volts till i hit vtec... than it go's to 13-14 volts like it used to with the old motor and ecu... it used to be at 13-14 volts all the time when the car was runing.
the only thing i havnt done is un wire vtec and put the pm6 back in.
im going to try that tomarrow and see what happens.
i had to jump start the car today...so this is a problem i need to deal with soon.

not really sure but check your grounds.

i would say get the alternator tested. if you havent messed with any of the wiring between the battery and alt then that would be my first place to check.

alright thanks, i guess i will go over it again.