1994 TBI miss at idle

[jammasterj]

I have a 1994 k1500 5.7 tbi 160k miles . I have an irratic miss at idle with engine cold or warm but worse when warm. I have replaced plugs, wires, cap ,rotor button, air filter, fuel filtter, pickup coil,. With no change from these parts I tried an throttle body rebuild kit. It had no effect on the miss either although it did give me a little more response through my powerband. I have sprayed all hoses and fittings for vacuum leaks and found nothing i sprayed around all intake runners at the heads looking for possible intake leak and still no response. Injectors spray perfect patterns at low and higher rpms. ANY SUGGESTIONS ARE WELCOME THANKS.