2.4 Bridgeport won't stay running

[dusty7075]

I have a - 4 liter Bridgeport 240 efi starts for 3 or 4 seconds then shuts off will start back up for 3 seconds then off again

[Dave Strong]

Fuel pressure is ???

Dave

[moparbarn]

Bad switch? Only getting injector fire in start & losing it at run position?

[pyro]

Fuel issue. The enrichment circuit is getting it rich enough to fire when the key is held to start, but leans out and dies when you let go of the key. You can confirm this by keeping it held to "start" even after it starts, which will typically disengage the starter bendix, allowing the starter to spin freely. If the motor continues to run in this condition (where the ECU is getting a cold start enrichment signal), then it's a fuel issue. Most likely TPI or a hose/fitting blockage.