So I yanked the hitachi off my truck a couple weeks ago and replaced it with a brand new 32/36 weber. After some tuning, it was like I had a brand new truck. All was good for a week or so and then in a 24 hour period, the idle went from smooth to progressively worse, to no idle at all. The motor will only stay running if I have my foot well into the pedal, and even then it surges. The second I take my foot off the gas, it rapidly dies. I checked all vacuum sources for leaks and checked to make sure I had fuel after the pump and after the regulator. I removed the regulator to verify that it was not the culprit and that did not help. I pulled all my jets and cleaned them out. Any ideas???