Hello all, I have been reading this forum for a long time and love the advice i have gotton, heres My story: 2004 screw 5.4 120000 about 1 yr ago began to get rough idle, at that time decided to change plugs, thanks to this forum i was prepared for the nightmare that that entails (bought the lisle tool before attempting) only broke off 4 plugs. improved things a bit, since then i have changed the fuel filter twice, (first time was very dirty) changed camshift position sensors, took apart and cleaned throttle body, cleaned maf, and most recently changed the tps when i changed the tps it finally got rid of the rough idle. Sometime during all this i managed to tear one of the vct seals causing it to leak oil. replaced that. now truck has a stumble upon acceleration, it onle seems to happen under load between 50 and 65 mph, idles smooth and when i stomp on it it gets up and goes no problem. held it in this range while mis behaving and got it to throw codes 0171, 2197 0113 all lean codes i think (Sort of) cleaned maf again seemed to help a bit any ideas would be greatly appreciated. Thanks Guys