On my seemingly endless mission to cure my backfire I was checking the airflow to the TBI from the air filter housing and spotted this pipe heading off under the fan housing and pointing at the engine but not connected. Is it an extra air intake? Is it supposed to suck more cold air into the filter as well as the proper one behind the grill? I've got the main inlet tube connected to the TBI and another one underneath connected to the engine block but this one seems to be a spare? Thanks again everyone!