Sup guys I'm having a strange idle when I turn on my car and when I turn on the air. Someone told me that it could be my alternator? When I turn the car on it goes to 2300 rpm. That's pretty high. When I turn on the vents my idle goes to 500 and wants to die. Also I heard that the alternator can be fixed by changing the voltage regulator on the back of it for $20 or junkyard. Is it true?? Or should I just rebuild it for $45 ??? Please let me know.