On the fly stopped in, red 2001 F150 4.2l, very rough idle. I asked if someone could run a test on the computer for codes. Mr. Taylor himself came out, directed me to MAF, didn't ask for anything, I gave him some ANYWAY, no one does that!! Check for free.. so, I went directly to the parts store, got MAF cleaner, as this was only 2 yrs old, but had it off for a while in the open air for other repairs.  I obtained a new air filter as well. Started up....NAILED IT!!! It runs like new!! I would recommend and honestly GOOD GUY business like this !! What a refresher in good ethics!