Cylinders 5&6 no bang bang?

So I swapped in a "JY" 4.0 with 135k into the wife's jeep. Hooked it all up, it fired right up but sounded like it had a miss. So I started pulling plug wires one at a time. Turns out that when 5&6 plug wires are pulled there is no change in the motor tone. Unlike 1/4. Compression in #5 is 125psi, #6 is 115psi. Wires and plugs both show spark. Noid light test on injector wires passed.Swapped injectors (twice) Tested resistance in all three sets of injectors. Checked all wires and splices New plugs, wires, cap, Roto,and distributor.

Jeep is a 91 aw4 np231j


HEP MEH PLEASE