Good day all. For a while now i've been having some concerns with my idle rpm & alternator charging voltage. i'm not sure if it's the way the vehicle is designed or if it's something wrong. The vehicle idles at 625 rpm. The charging voltage at startup is 14.1v but after 5 mins or less, & what i have to assume is the engine reaching idle temp, the charge drops to 13.2v & stays there not matter what until the engine cools again.
Is anyone familiar enough with these vehicles to tell me if this is normal? If so, is there a way to up my idle to at least 800 rpm?