[James the III]

I sadly have been there done that..
Was running bracket race at the 2002-3 super shevy show and was 2 rounds from getting money and a new set of BFG'S and the car fell on it's face.. on drive home it ran like crap.. hunted for the issue for a week.. after trying yet another idea, I drove it with no air cleaner housing, ok drove great,, power back.. drove an hours, good to go, get home put air cleaner and hoses back and left for a cruise /show and it in 15 minutes was back falling on it's face..
took the air cleaner off and just happened to be holding it the right way to see the flapper door closed.. sure enough.. drove to show/cruise with the air cleaner lid upside down and no issue.. put lid on correctly and the issue was back..
The flapper door left the building and happily ever after..