Took my new to me 1996 F350 Crewcab with 460 on its first trip last week...pulling 18 foot trailer with 5 motorcycles....did great on the way out to OK....on the way back when it would drop down for a really steep hill it acted real funny like it didn't have the same power or something....I got where I just ran it without the cruise on and didn't really have any problems after that...but....the check engine light came on...I took it by the local Autozone to have them run the codes....he checked it at the data terminal on under the dash on the passenger side....it appears my Cali truck is a OBDII MAF 460 .....said all he could see was a lean condition on both banks....I haven't replaced the fuel filter yet so will do that...truck starts right up and seems to run fine....any direction I need to head first?

Mike