So, is there any way to really tell if it's functioning properly other than swapping it out with a new one to see if it makes a difference. I am chasing a stumble start problem where my jeep starts perfect every single time, and idles great, put it in gear and usually still idles great. but if it was a "cold start" as soon as I start driving, it stalls the second I let off the gas, it hesitates and stalls, or if I feather it, it will pop and stutter then return to good idle, then stall again as soon as I give it gas and let back off the gas. (it can't seem to handle returning to a normal idle from, let's say backing out of a parking space, right after I start it) As soon as I restart it, it starts perfect again, then repeats the malfunction until it has been running for about 2-3 minutes. After she warms up, she runs great the rest of the day, or until it sits for a few hours and we are back to the "cold start" stage. Also, to give a clearer picture, if I jam the gas at any time, it "chokes" for like a full second before it will open up, and sometimes POPS when it does clear it's throat. It really runs GREAT other than this issue, so I am trying to find that last piece of the puzzle.