Quote:
Originally Posted by Sieg
Scott,
First off a disclaimer that I have little knowledge of 2nd Gens.........
I had a similar experience with drop off in fuel pressure and in my case a new pump solved it.
> If the cap isn't vented how does the fuel tank vent?
Another connection I spotted that concerned me on my car was the connecting hose between the tank hard line and the chassis hard line in this pic:

I replaced it years ago, but it felt soft enough that I was concerned about it collapsing under heavy demand so I replaced it.
First guess is a venting issue as the tank has to vent for the oneway system to work. The car sat for a while right? Bug debris effecting venting?
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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