whell i guess if you have charging, etc problems, that could cause a ****ty idle, my car wont idle low, it just dies, ppls said to set the idle to 700 with the iac unplugged, whell it idles low for a sec, then just randomly dies so i cant set the idle to 700, i have to keep it at 1,000. and after going crazy trying to get the thing to not hang, air screws, throttle stops, etc im done. i gotta try something else. now, i have noticed that there is something making a knocking sound when its cold, and it sounds liek its coming from my alt, and! when its idleing at night w/ headlights the voltmeter fluctuates with the lope....hmm now, could this be my problem? also i have u/d pullies, maby ill switch out the alt pully to the stock one. how much is a new alt, and where can you get em cheap, and how can you check yours?