94 powerstroke missing,running terrible
 

This truck was fixed a day ago, I put a HPOP and new O-rings on injectors and the truck started after trouble shooting for a longtime. The truck ran great for 3 hrs and then started loosing power and missing or so it seemed. Im wondering if i somehow put the injectors in the wrong way, any ideas will help me trouble shoot this engine again, just changed the fuel filter and still the same if not worse. can someone get me a link to a how to on injector removal and install. thanks in advance guys...

This is the one CSIPSD posted: https://www.dieselbombers.com/ford-p...placement.html