so there is a metal on metal, really loud chirping/squeeking noise coming from the front of my engine. i know it could be many things. tensioner, power steering, idler. So my question is have any of you had a really loud metal on metal chirping sound before? and what did it end up being? it only does it on initial start up for about 5 seconds. it does not do it during idle. it does it at slow speeds under slight throttle or when going any speed and i let off the gas, it does it til it's back down to idle rpm. i can floor it and it won't make a single noise though. thoughts? since it doesn't do it at idle it's hard to pinpoint, and if i stand in front of the truck and have someone start it so i can listen for it upon startup, i can't really place where it's coming from. high low left right. It's so loud i would think i could pinpoint it but not so easy.