My 2.5l turbo spirit is giving me issues. She misfires under any load.

I checked the timing and it’s good.
changed the plugs wires...no difference.
changed the coil, no difference.
Changed cap and rotor, no difference.

I swapped the hep to another one i had, but no idea if it’s good.

does this sound like a hep issue or is there something else I’m missing?