88 Plymouth Voyager

The van will try to start but will not start and enough to override and kick out the starter. It will fire but immediatly die. If you work the gas pedal you can keep it going as long as you keep working the pedal back and forth and it will kick out the starter and run, as long as you work the pedal, if you quit the van dies. The coil, the pickup coil in the distributor the fuel pressure regulator the fuel filter and the air filter have been replaced. No change ine the condition. The engine has set no codes. The rotor has been cleaned and the capthe return fuel line to the tank is clear and the connections have ben cleaned and secure any ideas.