When I step on the gas in my 94 accord ex, I get a loud squeal (don't know if you can hear it outside the car but its plenty loud inside the car). at first I thought wheel bearings but I just replaced those and its still there, its weird because it doesn't happen when car isn't in gear (ie neutral or park). it doesn't normally do it until I get to 2000-2500 and give 1/2-3/4 throttle (passing or accelerating into traffic). under normal acceleration (ie shifting near 2000-2500rpms) I don't hear it at all.

I don't know if its related, but the hose under my intake that goes to my resonator chamber (located under air filter) has a hole in it.

 

Check your accessory drive belts, power steering and alternator & A/C. Make sure they aren't too loose or worn.

 

Does it do it when the AC is off? If not, then it is the AC belt as mentioned in the above post.

However, if it does it even with the AC off, it could still be the accessory belts.