No,i dont think wnything is wrong in intake...if your pulling hose of,where is it your doing this at....at the carb? Sounds like its getting to much fuel at carb and when you pull hose of if thats where your doing it then its dropping the PSI enough to get it started......is there any way you can take a few pictures of the regulator and solenoid and also the carb and email them to me,email is in my profile,want to see exactly what system you have...