I have been through this system completely and this one is a real pane in the a-s. Its not the main relay,. its not the fuel pump, There are no blown fuses, but the main relay is not cycling like it should. Usually when the key is turned to the on position the main relay clicks twice, first click runs the pump to prime the system second clic, shut it off. The problem here is the second click never happens and the pump never runs and vehicle will not run. The owner took some info from a friend and replace the distributor and fuel pump even after I told him that was not the problem. And I cannot find the problem on the internet, it just keep going back to the main relay, and with this one that is not whats wrong. I even tried the relay in another vehicle and it started and ran fine.

Any suggestions?

Steve