It's the purge valve thumping. Yes you can feel it without a doubt. I can't believe how loud that is from something that appears to not have much internally. I am looking at the Ford one now for $54.27. Hopefully the new one knocks out this sound for a bit. Thank you all for the time and solution.Purge valve selonoid. Feel it for a pulse. Pretty common and sounds like that. It on the throttle manifold drivers side.