Changed the pump out. It start Dec.4, it just didn't start. So we pushed it out of the driveway. I turned the key and herd the pump come on and the van started. now you can't hear the pump at all.
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I'd have to test when problem is ongoing. When you first turn on key, no crank, you should hear the pump run for a few seconds then stop. For initial prime, the computer doesn't need rpm signal. Engine cranking, the computer needs to see rpm signal or it won't ground the fuel pump relay. W/o rpm signal, no spark at the plugs and no fuel injector pulse. I know your talking about fuel, but, when problem is ongoing, check spark and fuel injector pulse, engine cranking.
Intermittent problems are a pain, have to test when problem is ongoing.
Not guessing as to what the problem is , testing for voltage drop problems with a volt meter . posted a video on youtube yesterday . If your still looking for guesses forget it , no one on here could say for sure without testing the circuit an hooking up a scan tool to see if PCM is energizing the relay . Do yourself a favor an take it to a qualified repair shop . Fuel Pump Electrical Circuits Description and Operation If you can't learn how to test from this guy , better take to a repair shop .
Any service engine light?
Can you hear the fuel pump hmm for about 2 seconds when you first turn the key on?
If no, then it may be the pump, relay, ECM or the circuit in between them. Since it got out the driveway I would lean towards the pump. Another thing to check that powers the fuel pump is the Oil Pressure Switch. It will energize the pump when there is oil pressure.
If the fuel pump does buzz, check for spark. Pull a spark plug wire and set it by a ground source (a bolt on the head or rocker cover, not a fuel line!). Don't touch the wire as there is high voltage crank the engine over while someone watches for a spark. If no spark then take the ignition module to an autozone to have it tested.
If there is a fuel pump buzz and a spark then the fuel pressure should be tested.
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