New guy, probably old question

It's definitely coming from under the dash, happens under acceleration at low RPMs but not in neutral sitting still at least not that we could duplicate anyway.. Is the spring you mentioned listed in the exploded diagram of the pedal linkage as an "over center spring"? It does appear to be slightly touching part of the linkage next to it and I can see how that may telegraph this noise up under the dash. The best description I can come up with is a rapid metal on metal clanging noise, seemingly independent of engine RPMs or road speed... Honestly, I figured I'd look under the dash and spot something loose without much trouble, it sounds like it should be obvious if you know what I mean.

ETA it does stop once the pedal is all the way out, but oddly enough, it varies as to when it quiets down. Sometimes it quiets as it's still coming up and sometimes it doesn't quiet down until right as it hits the stop.