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This is a really classic and common old car problem. I see it all the time but this is the first time it's started happening to my own car.
Basically when I first turn the car on, there's instantly a pretty horrific squealing that sounds belt-related, and develops to an even higher pitch as I pull out of my parking spot cutting off the wheel to the right or left side and drive away.
What could be the issue? I drive a 2004 Ford Ranger. The main belts are not brand new, but are alright.
The horrific squealing sound is your belt rubbing on on some pulley. Typically this means that either
If the belt is cracked or feels like its dried out then its probably time for a new belt. There's also a product called belt conditioner that you can spray on the belt. If this fixes the squealing then its likely just a belt problem and you should replace it. They're typically pretty inexpensive so if in doubt it won't hurt to replace it.
If the belt is loose, then tighten it and see if the noise stops. If so and the belt seems to be in good condition then you're probably ok.
If the belt is not loose, then whether or not the belt seems like it needs to be replaced, the next step is to take off the belt and check all of the pulleys. The most likely culprit would be an idler or tensioner pulley.
