N14 missing around 1500-1600 rpm

Most likely injector

 

I would agree it's likely an injector. I like to run return fuel into a clean 5 gal bucket and look for aeration. I've seen loose injectors cause similiar symptoms.

Will it miss if you just throttle up under no load?

 

Unplug your injector connectors one by one until the miss doesn't change, then you have found your faulty injector.

 

i have a truck doing the same thing, you ever solve your issue?

 

Only between 1500-1600 if you have a spare ecm to try. Injector maybe but only for 100 rpm span then goes away? Only on high side? Goes away after?. I'd venture out to say it is a bad injector or harness that is missing or weak all the time your just missing it because the engine isn't fully loaded on the low end or your a high shifter. I'd run her down to 800 rpm in highest gear and hammer it, you might feel it the whole time just more pronounced around 1500.
Shot the exhaust after a run look for heat difference between cylinders.

 

I found my issue, it was the #3 injector harness/pass thru. Manual says resistance range is .5-1.5 ohms for injector threaded contacts, injector internal harness, and injector pass thru connector, I checked out all 6 injectors, their jumper harness's and the pass thru's and stayed around 0.6-0.8 0hms, #3 was at 17k ohms, but only when the internal jumper harness was connected to the pass thru, the rest of the time it had readings like the others. telling me the pins were spread on the deuch connector causing high resistance. hopefully I've explained that good enough.