1992buick Lesabre there is no air coming out of your vents at any level hot or cold but when you accelerate the speed you still can feel like a little cold air coming out just a tiny bit what could it?

You're blower fan isn't working at all, but when you're driving air will still come in through the vents. Obviously, the faster you go the more air will come in. If you're just parked, no air will come in. Check you're fuse, blower motor, relay, switch, and resistor. It could be any of those. Sorry I can't be anymore specific. I'm just basing this on what you described.