I bought a 2009 3/4 ton 6.7 it has head studs, South bend clutch, smarty race me tunner, EGR delete, it was acting like starter was dragging so I put new starter on an same thing so I pulled head an noticed #2 piston was burn up didn't mess cylinder up so I put new piston an rings in it put back together an now it turns over great sounds real smooth just won't crank, maybe injectors? Thanks for any suggestions