Injectorshow can i tell if they are firing?

Had a previous problem with the fuel pump relay which I located behind the radio Replaced it and it ran fine. Not getting fuel again so replaced the relay again with no luck this time Plenty of fuel Fuel pump sounds right Already checked inertia switch Any suggestions?

Had a previous problem with the fuel pump relay which I located behind the radio Replaced it and it ran fine. Not getting fuel again so replaced the relay again with no luck this timeGot fuel, checked inertia switch, I can hear pump pressuring up. Any suggestions?Possible fuel filter...

HelloChecked the safety shutoff switch on passenger side Got plenty of gas I can hear the pump running...,.

Just a suggestion, when I took out the radio to reach the relay cluster I pulled the whole cluster from its location and dropped it down near the gas petal. Now I can reach it just by removing the fuse box cover under the steering wheel

Had a previous problem with the fuel pump relay which I located behind the radio Relaced it and it ran fine. Not getting fuel again so replaced the relay again with no luck this time Any suggestions?