Hey guys, I have a 2000 superduty with a 5.4 with 77,000 miles on it. When you floor the pedal, it doesn't do anything while driving at about 20 mph. If you gradually give it throttle it will gain speed but eventually fall down again especially when the outside air temp is hot. I changed the fuel filter, airfilter and cleaned the throttle body with throttle body spray. It idles alot smoother but it still has no throttle response. It had a 0174 bank 2 lean code so I cleared it and it has not come back yet but it is still not running right. I was thinking a throttle position sensor? Any ideas?