'87 Suburban ignition prob!

I have a n '87 burban 4x4 with a 5.7L. I have replaced the plugs, wires, cap, rotor, and coil. The motor turns over just fine, and fuel is being deliviered via the TBI. I am lost! Does anyone have ani insight/ suggestions?

Welcome to AF, to be clear you have no spark, but the injectors spray, engine will not fire?

Motor does crank, injectors spray, and no spark. You are correct.

have you tryed changing coil or pic up coil in distributer???? becuse no spark no start.
good luck to you.....

I changed the coil. Not the pick-up coil inside disributor though. I think I'll try that, thank you