Alright so here is the basic rundown....I have a 2001 f150 4.2L. I was having some issues with it throwing lean codes but could smell it was burning rich. I logically replaced the intake and plenum seals. In the process hydro-locked the motor, got that situated and replaced the spark plugs. Now I'm still getting lean codes and its idling very hard. I reset the computer by disconnecting the battery and reset the codes via obd2. Getting misfires and major evap leak codes. Can not find a single vacuum leak and lost on what to do next...