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You must drop the fuel tank.
it is part of the fuel injector which is under the upper intake manifold
the pump is in side the fule tank drop tank replace pump get a astro van manual
the fuel pump is in the fuel tank--which is located about half way back on the drivers side...
inside the fuel tank, tank must be removed
You need to lower the fuel tank to get at it.
It might be on the firewall under the hood on the left side.BEst of luck....I to am haveing trouble with astro van.
For your 1994 CHEVROLET TRUCK ASTRO VAN 2WD: FUEL SYSTEM PRESSURE 9-13 PSI(POUNDS PER SQUARE INCH) You can find this stuff free at autozone.com under specifications.
drop the fuel tank and it's inside. remove the retainer on top then pull out the pump from the fuel tank
Open hood, look to your left top cowl (firewall) , you will see two relays, the larger of the two is the fuel relay.
It should be located under the vehicle on the frame on the drivers side just below the drivers door and the fuel door.
Need to check or replace the ingnition module in the Distributor.