Vapor Lock???

[Rick D]

Originally Posted by protour73

Back in the day, venting lines ran from three vents off of the tank to the charcoal canister in the engine compartment. Hence, no vented cap. I ditched that whole charcoal canister system back when I started the build.

I have that same connecting hose basically on the 2nd Gen. Mine seems fine, and since I have a brand new pump installed, I've eliminated that possibility.

The car has been out including track time. There is always the possibility that the ethanol fuel around here has compromised the sock filter on the pickup of the sending unit in the tank. So I may have to drop the tank

Um you don't want to look under there

Did you try to run it with the gas cap off like I said yesterday?? If it doesn't drop then you know it's a vent issue? If it still drops then it may be the pickup in the tank.