ok my mustang family havin some issues here need some assistance any would be most appreciate...so i desided to install a 130 amp alternator my stock one was juz not holding up i started to notice i had slight dim on my lights n also i’m planning to install an electric fan later on...so after i install this 130 amp i was havin two issues...one, every time i started it up it’s revving up the engine n then it goes down to regular idling...second, my voltage needle keeps going up n down n when i turn on blinker it goes up n down same rythem as the blinker...great more headaches!!