No Fuel Pressure after driving car.

Update to my fuel pressure issue.
I did some testing today and drove the car a short distance and had no problem today. But with the new tank and 3/8 line sitting in the box I decided to get after removing the tank. Back up on Hoist I had tank out in 30 Min. It is full of trash and pickup is half broken. Lots of rust on top inside original tank. Next step I will remove the original 5/16 line.

Aj I like the idea of the jumper lines and clamps. I am not sure if I should use a 3/8 band clamp or 2 3/8 gear clamps.

and 70 Duster crate it is not the liquid filled type. I have one of those also and it was sitting for years and it was inop out of box when I tried it last week.

One possible problem that could have caused sucking air is the canister fuel filter I use in the engine bay. it is super old and been in there for 30 years. But to be honest I think the trash in the tank was clogging my pickup and restricting fuel flow.
That's looking all too familiar. It wasn't as bad when I was just imagining it,lol.
The bad news is the inside of the supply line could be looking all varnished up like that too. So if you clean it out chemically with one of those while-you-drive recipes, it will clog your filter. Keep a couple of spares in the GB, until things settle down.
Oh Wait, I see you are replacing the lines too, good move!
Yes I Just installed the new 3/8th stainless line about 30 min ago. Having the hoist made this job easy to do.

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