Hey, Scotty, I have a 2000 Toyota 4runner, (just under 160,000mi) and it makes this loud whirring noise while accelerating/giving it gas. I cant pin down exactly from where its coming from, but its awful loud, and i sure dont want to break anything. This is a relatively new noise (past 6 months) and i cant remember when it started. Some more information on it: If i let off the gas, almost immediately the noise dies down. the noise is there, even if im maintaining speed (even on slow roads) and ive noticed a sever drop off in fuel economy (form right around 20mpg, to about 13-10) Let me know if you need any more info!