Fuel is bleeding back to the tank

[jag7720]

I think I found out why I killed my starter...when I park in the part of my driveway that is sloped I have to crank the engine an excessive amount in the morning then I get a high rev start then it dies... then more cranking with the pedal floored... then it starts.

So, my question is... why is the fuel draining back when on a slope and what do I do to fix it?

 

[CCATLETT1984]

there is a check valve in the lift pump on the side of the enigne that can go bad, its not an expensive part but its a PITA to do (I've done mine twice, once due to a bad replacement part )

Oned easy way to fix this would be to put an electric pump back on the frame rail near the tank and plumb it into the fuel lines (you can use the electric pump from a 93+ chevy diesel) and run that to a switch that you flip for a few seconds before starting to prime the system.

 

[jag7720]

I like that idea...could I just run that pump all of the time instead of the manual pump?

 

[acetomatoco]

The old O ring in the fuel filter housing trick and the rubber fuel line cracks are also culprits.. Just plumb in a 12 volt electric fuel pump with a straight thru design in the fuel line down stream from the block mounted pump and use a momentary switch to prime the system or find the leaks. Or you can park with the nose of your truck pointing downhill.

 

[m38inmaine]

The mechanical pump on the engine block was updated at some point and contains a check valve that prevents drainback, I installed them on mine. If you buy a new pump at a GM dealer it will be the new type, they were less than $30.