[mccrajos]

I have a 2000 pre runner(toyota). It makes a squealing noise a lot like a bad bearing does. It does not make this noise in idle but as I accelerate it starts,around 10-15 mph. if I let off the gas it stops. Any idea what it could be before I take it to the shop?

[kitch428]

Most likely it's opening up an air gap upon acceleration. When the engine is under torque load, it leans toward the drivers side. The intake hoses are made to be flexible. That's why we call them 'boots'.
Look at all the intake hoses for loose clamps, and pay close attn at the air filter box where it makes a transition from rubber to plastic tubing. You see any gap there? This will cause a high squeal type noise. (air rushing in)
The A/C idler pulley is another high pitch noise maker, but I'd think you'd hear that at idle.