Hey scotty i have a 93 chevy Cheyenne with a tbi system and it doesnt get fire i changed out the spark plugs and wires as well as the ignition coil still no spark i have even put a spark plug on the short cable leading from the ignition coil to the distributer cap and it has no fire from the ignition coil
What would be the next step and how to check

Check to be sure the ignition coil has power at its positive circuit. A faulty distributor pickup sensor, the ICM, or a faulty ecm can keep it from running. Could just replace the entire distributor assembly and see if that helps.