pick up lines in fuel tank

[zdude1967]

Quick question, does filling the fuel tank to totally full serve as a reliable test to determine if the pick fuel pick up lines are working or in need of repair.

Thanks

zdude1967

[beermanpete]

Sort of. The pick up line is below the fuel level when the tank if full, so if there is a crack or pin hole in the pick up line it will suck air when the fuel level is below the crack/hole. This will make the car act as if it is out of fuel before the tank is actually empty. If the line is blocked the fuel level will have no effect.

What are your symptoms?

[zdude1967]

hestation, empty fuel bowls, air in fuel line. It was suggested that it could be the pick up lines. It does the same thing when filled all the way to just below the gas cap. I am guessing it is not the pick up lines,what do you think?

[beermanpete]

Not to likely. It could be a bad rubber line, a bad fuel pump, a cracked fuel filter, or a bad steel line (the one that runs the length of the car). The steel line is pretty well protected from damage so it is the least likely.

Look for fuel stains and/or very clean spots near the fuel lines near the tank and near the fuel filter and pump. An air leak can also be a fuel leak, which would leave some evidence.

Have you performed the diagnostic procedures suggested in the factory service manual?

[Duffman]

Glenn, check out my thread, had similar symptoms. Try some of my fuel line tests, worked for me!

http://www.classiczcars.com/forums/showthread.php?43424-Electrical-Issue