If you think it's got a miss, go to harbor frt and buy a non contact thermometer. At cold start, hot is more difficult to pin point and if you run it and let it sit, heat soak comes into play causing a cooler spot to soak up the heat from other areas, measure the exh. temps on the manifold where the exhaust port is. It is normal for the outer, 1-6 to be cooler, 2-5 warmer and 3-4 warmer. The temps should be close, example 1, 150, 6, 145, 2- 165, 5 170, you get it. Not normal is 2 at 150 and 5 at 80. 5 is your missing cylinder. You can do it with just your hand, you will feel the difference or wet your finger and see how long it takes for the wet spot to go away, the one that stays on the manifold is you issue.
Be aware, a miss or low cylinder contribution can be caused by high fuel restriction, low fuel pressure, valve settings or a component failure like a burnt/bent valve, bent rod, scored piston. Those 3 will usually be accompanied by white smoke.
I am not up to speed on the ENDT but I believe that the injectors are pintle type. They are just springs and shims inside that adjust the pressure on the pintle so it opens and closes at the correct pressures. You can't rebuild them without the pop tester. I also think they have a Bosch style fuel pump, might be wrong, I can look tomorrow, but they, most all types of those pumps, use a device that regulates pressure in the gallery of the pump. Low pressure there can cause what is felt and sounds like a miss, but it is low pressure in the gallery causing a non precise injection event.
