Ford Econoline e250 2002 4.2l missfirea
 

I have changed out all sensors, replaced plugs, tested the spark In the wires, changed fuel regulator and filter. Had a new fuel pump at 100k has 200k on it now. I think I hear some rattling around inside the motor or valve over on the p side. I have missfirea on 4-6 which are on the driver's side.
I have replaced two fuel injectors but the others are original.
I can't figure this out. It sounds like something is broke but not sure it's just valves pinging from the missfirea. I have an ob2 scanner but I'm new at reading the live data. Any information regarding what I should see in live data or shouldnt see would be helpful. Any info at all would be great. Thank you in advance.

Hi Nick,
Can we get a little more info?
When did this problem first appear?
Was it there before you replaced all the parts or did it show up after ?
Ford did some sneakey things with some of the small "V" engines and that is why I need as much info as you can provide, thanks.