Fuel supply to carb, 1985 720

[JonSmith720]

Fuel won't flow past the needle valve, it's the original carb with electronic choke, I've tested the fuel line next to the carb and it's running 5 psi, I've blown out the filter housing above the valve and still won't flow. If I turn on the pump it will come through the line but not into float chamber. 1985 z24 regular cab

[bilzbobaggins]

You take the needle out and inspect? Did you try hitting the banjo bolt with a screwdriver handle?

[JonSmith720]

Yeah I did, I doesn't stick, I've put air through the banjo bolt and it doesn't seem clogged, and I've also put air thru the top of where the needle valve sits and I can feel it flowing through still no fuel getting thru

[bilzbobaggins]

Is the float stuck up?

[JonSmith720]

No its resting in a down position with the cover off, it moves freely when pushed up or down

[banzai510(hainz)]

Its like the valve in your toilet bowl.

 

maybe needle is stuck closed weather the arm is moved or not.  could be rust or dirt keeping it closed

[bilzbobaggins]

How old is the rubber fuel line? No kinks?

[JonSmith720]

I've cleaned the valve and it falls out freely when the float is taken out, so I pretty sure it isn't rust or dirt binding it

[JonSmith720]

Bagging, I've replaced the rubber hose on the line and it's solid

[bilzbobaggins]

Is the float height at the right adjustment? This just start happening or has it been sitting?

[JonSmith720]

The float is at the correct height, it started running real rough so I let it sit for a couple of days, without the valve and float gas pours in the chamber

[JonSmith720]

The original float valve has a little spring rod on the bottom, does anyone know the purpose for it?