have you checked your car for aliens?
its amazing
A Toyota RAV4 would make a loud noise while driving if a piece of hardware like the camshaft is damaged or something is caught in the drivetrain. This will result in noise and potentially costly repairs.
Bad shock mount? Loose exhaust system?
A little kid in the trunk with a hammer
check shocks
Wheel bearing.
If the noise sounds like a banging sound it could be that you have a worn timing chain. Note: 22re's have timing chains not belts. You should have the noise checked-out by an experienced Toyota mechanic.
After putting up with the same noise for about a week I researched online and found a suggestion that worked! Change the filters! That's it! That's all it was!
With out hearing it, It is hard to say whats wrong. But the most common noise like that would probley be a ROD knocking. Time for engine overhaul.
The most probable cause is poor fuel or water in your fuel. This could also be due to the timing being out of proper adjustment.
loose belts