99 tahoe skiping

runs good some times .than start missing will not stop till cools down.good compressen ,new distributor and cap, wires, plugs,&all 4 o2 sensors.and just put cats on. some times will go weeks with out problem. But is geting more often.fuel pressure 55 to 60 psi stays same when it starts missing.also new fuel filter.350 with cfi injection.