i have an 1988 trooper...when i start it it will run for a minute, then die, or not start at all.....i can heat the fuel pump running, but it stops after 10 seconds or so....ive replaced the fuel pump, alternator, checked fuses.....problem is still there...im getting tired of throwing parts at this thing...any thoughts from the peanut gallery?

 

Replaced the filter or checked the regulator? Or fuel pump relay.
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GENERAL DESCRIPTION

In order to control the Fuel Pump (FP) operation, the Fuel Pump (FP) relay is provided. When the starter switch is turned to "ON" position, the FP relay operates the FP for 2 seconds. When it is turned to "START" position, the Power Train Control Module (PCM) receives the reference pulse from the Ignition Control Module and it operates the relay, again causing the FP to feed fuel.
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Removal Procedure

1. Remove the fuse and relay box cover from under the hood.
2. Consult the diagram on the cover to determine which is the correct relay.

1. Insert a small screwdriver into the catch slot on the forward side of the fuel pump relay.

1. Pull the relay straight up and out of the fuse and relay box.

Installation Procedure

1. Insert the relay into the correct place in the fuse and relay box with the catch slot facing forward.
2. Press down until the catch engages.

1. Install the fuse and relay box cover.

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