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oh and that post about the chain few above if remeber that was a tsb it was about the chain rumbilng and ticking on start up. it sounds like u start the truck with no oil. t was only on start up and cold engine

i'm a ford tech. if you have ce light with with codes p0171,p0174 (o2 bank 1,2 lean) its 9 times outta 10 intake gaskets. if you have access to a scan tool to monitor pids pull up 02s, long term trim and short term. spray the intake with carb srpay and watch the pids. bad intake gaskets when...