You don't need to run that recirc valve, either one or the other, if you remove the recirc one just block it off. I left mine on but it's disconnected. I wouldn't of said it was a loose pipe on the air filter, as it would still be sucking in as much air as needed. Also from looking at the picture, where the dump valve is attached try swapping that clip for a small jubilee clip those standard clips aren't the best. Hope this helps.