GMC Repair: wont start, crankshaft position sensor, fuel pump relay

Question
have 91 s15 4.3 was running great pull up to stop and quit can make fuel run only through test pug in wiring harness have no spark at coil.  have changed coil, ingiton swicth, ingiton moduator fuel pump relay, and it isn't showing any promble code in system

Answer
I really can't understand most of this message, but you should check for power and ground at the ignition coil. If you are not getting spark from the coil and you have power and ground, either the crankshaft position sensor is not sending a signal to the PCM, or the PCM is not sending a signal to the Ignition control module, or there is a wiring problem.

If you could send me a new question with a better explanation of what you have done.