so, this saturday i took the plunge and changed the plugs in my 4.6l 2005 f150. i have to admit, i almost didn't try it. also, i cleaned the maf sensor with maf sensor cleaner. like stated in a post below, my cluster is giving me a D950 code. it only started this after i did the maintenance. the only thing i can think is that i didn't disconnect the battery right away. i googled the code and it came up on another forum. the guy said that the dealer had to replace the cluster. i have an appointment this sat at my dealer regarding the noise which i think is coming from the cluster. i just wanted to say that my truck runs much better since i did the little tune up. the torque converter seems to lock up much better and is constantly locking/unlocking. also my throttle response is improved. i would have neverthought that cleaning a sensor could make this much of a difference.

 

oh yeah, the MAF sensor needs a good signal, as it has an effect on everything.