Hey all ! My 4.0 runs generally good , some times great , occasionally kinda rough.Always starts perfect .Have checked vacuum lines , plugs , coil packs , everything looks great. The only time I got a favorable change was when I cleaned the MAF sensor, it did not appear to be dirty at all but sprayed it as one would if it were .It ran much better for a day or two now back to same program. I unplugged the MAF , still runs same poor .
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