Sorry, I don't know what you mean by that. Did you try running without your fuel caps on?have never noticed a vacuum in the tanks.
Even if the lines are new, given sufficient vacuum, they can still collapse.One auto tech said it sounded like a fuel line was collapsing, but all rubber lines have been replaced.
If you don't have fuel in the filter when it dies, you are clearly having a fuel delivery problem.
This would suggest to me, the new pump is able to help compensate for the problem. It is also the reason I want to be clear about the fuel cap; If you are creating a vacuum in the tanks, a stronger pump would potentially allow it to run a little longer.I have now installed an electric fuel pump that helps it from stalling, but has not solved the problem.
Did this problem occur on both tanks simultaneously?
Does it have this problem when held at a fast idle?after driving for maybe 5-10 minutes, the engine will surge (like the metering valve sticks wide open) for a few seconds. within 20 seconds the truck will start to lose power and the engine will shut off.
I believe LMJD was not suggesting Mark check the schrader valve, rather he was suggesting Mark use the schrader valve to check the fuel pressure in the system; much like you would use the schrader valve on a tire to check the air pressure in the tire. (Although, we have since found out he no longer has the schrader valve.)I am saying if the schrader was leaking, you should develope your symptoms withing a matter of two minutes (after sitting over night)