I have a 2002 Dodge Ram 1500 5

I have a 2002 dodge ram 1500 5.9 360. The check engine light keeps coming on it I reding random misfire on cyl2 nd sometimes cyl4. I have had a full tune up, had 2 different mechanics do a compression test both test came back good, 1 of the mechanics works at a dodge dealership and is certified with 10+ years, also had vacuum and leak down test dun checked out fine. Have been told it was full of carbon. Ran cleaners nd heat through engine I't did not work. Took into valvoline xpress care and had engine and fuel system cleaned. Said throttle body was dirty. Both mechanics say there is nothing wrong with engine. One mechanic sai it has more power than his dodge of the same year and the fuel mileage is great. Truck runs great but idles just a little rough. Have fixed 2 vacuum lines leaking. The cruise control won' t hold speed either. Could the PCM need to b replaced? The check engine light is a hard code. Also hd fuel system pressure checked and it held.