Not the INSTALL!!! SAY IT AIN'T SO!!!
My guess is it ran like a f'n champ within 20 minutes. It will take a few starts for it to get that part spot on -- then you can hit the key and never touch the gas and it will fire off instantly.
Personally I'm so happy that you found the issue. Seems every time I've had to find something -- it always comes down to some stupid little item you wouldn't think of in a million years. I've learned to just look at EVERY SINGLE thing when someone is having an issue. I take nothing for granted and I don't care how many times a guy tells me he followed the instructions --- I find they DIDN'T.