Hey how's it going I'm Butch new here .I've had this 2002 Harley f150 for about 6 months don't know much about it .It has what I believe to be stock upper pulley And a number 8 motor blue lower , cone filter stock tube , and fluidyne intercooler .I'm having a lean condition on bank 2 PO174 and when I shut truck off U van hear a big rush of air being sacked in or blown out not sure which the noise is On driver side mite even be through air filter it's hard to tell any ideas ? New stock plugs , cops, fuel filter, and iat sensor Thanks in advance Butch