Hey folks,
I recently purchased a 1997 B1500 109" wheel base (shorty) van with a 5.2L V8 and the 46RE transmission.
I knew buying it that it was cranking and the engine will run briefly if I spray starter fluid into the throttle body but that it will not continue running or start without something put into the throttle body. I also could not hear the fuel pump engage when I turned the key to the run/start positions. My diagnosis was that the fuel pump was bad (it had been sitting for about 2 years before I bought it and the tank had almost ZERO gas in it).
I recently replaced the fuel pump and this did not fix the issue - though after checking all the fuel line connections and fittings from the tank to the throttle body I noticed there might be a drizzle of gas...but not enough for the engine to start or stay running after I got it to briefly run using starter fluid in the throttle body.
I have done the following:
Many thanks,
Shane
I recently purchased a 1997 B1500 109" wheel base (shorty) van with a 5.2L V8 and the 46RE transmission.
I knew buying it that it was cranking and the engine will run briefly if I spray starter fluid into the throttle body but that it will not continue running or start without something put into the throttle body. I also could not hear the fuel pump engage when I turned the key to the run/start positions. My diagnosis was that the fuel pump was bad (it had been sitting for about 2 years before I bought it and the tank had almost ZERO gas in it).
I recently replaced the fuel pump and this did not fix the issue - though after checking all the fuel line connections and fittings from the tank to the throttle body I noticed there might be a drizzle of gas...but not enough for the engine to start or stay running after I got it to briefly run using starter fluid in the throttle body.
I have done the following:
- Disconnected the fuel line at all junctions and sprayed compressed air throughout to make sure there are no blockages in the line. This does mean that currently there is NO gas in the line at all...probably not in the fuel rail either.
- Tested with the tank fully installed as well as re-lowered - same issues
- I cleaned and purged the tank and am using new gas
- I used a Power Probe to try and supply the pump with a positive feed to see if it would pump gas but this does not work. With the Power Probe attached I do find that the pump gets a positive signal for just a few seconds and then it goes off. I learned that this might be normal for the following reason: "The fuel pump is supposed to do that when you first turn the key. It won't run continuously until the engine starts. The PCM has to see a crank signal to close the fuel pump relay contacts. If no fuel comes out when you turn the key you may have a plugged filter sock in the tank." I don't think the filter sock is clogged as this is a brand new pump. This issue has been present on two different fuel pumps as well. Could it be that the Crank Positioning sensor is not sending a signal?
Many thanks,
Shane
