Alternator/Battery/Electrical issues...

Wassup, everyone! I was looking for some information on some issues I'm having iwth my 91 CRX. For one, I had problems with the alternator to charging...swapped that out. After that, the car's idle now fluctuates big time. The RPM's are between 1000 and 1700. Any one have any suggestions as to what might be the solution? I thought just swapping out the alternator would solve my first problem, but now I got another one...Any help and information will be greatly appreciated.

Thank You and ALOHAZ,
HYN_REX

Alternator has nothing to do with idle. Most idle problems are caused by the IACV.