Ok so im picking up a 2000 ford f150 5.4 and i went and checked it out and it runs and drives but not good i unplued each coil on the driver side and did notice it made it worse did the same on the passenger side and no change in performance

 

UPDATE: checked compression on passenger side had 80 on each cyl and 125 on the driver side took front cover off and pass had jumped time about 3 teeth and the main Guide had came apart going to fix it and see how it runs will update more to varify that was the problem

 

Re chain it and test the comp before buttoning up ..