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Here is the common sense G.M. service technician approach to you dilemma Because there is no fuel getting to the engine [make sure there is truly enough fuel in the tank as the gauge is often wrong]. The starting fluid is temporarily acting as the fuel until it quickly burns away. Start with the simple things first, in this order: !] Check for a blown fuse in the fuel and/or ECM circuits in your fuse panel. 2] Check for a bad fuel pump relay in your relay/fuse box. 3] Replace the in-line fuel filter [under the vehicle, along the frame, ahead of the fuel tank]. Replace this regardless, as it is the most ignored and damaging item to the expensive electric in-tank fuel pump. 4] Last and most difficult & expensive: Remove the fuel tank and replace the in-tank fuel pump. FIRST though, a simple test for this is to remove the gas cap and put your ear to the filler neck. Have someone turn the ignition key on. If you hear a whining noise from the neck, the pump does run. If you hear nothing, get a heavy rubber mallet or heavy block of wood and hit the bottom of the fuel tank hard while the key is on. If you still hear nothing the pump is most likely bad. If the pump starts to whine or the engine will now start, the pump is still bad. You have only temporarily jolted it back to life so don't count on it working again. bestoflucktoyou

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Q: Why would your 95 astro van only start with starting fluid?
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