Carb fuel issue help

[TXBronco 67]

Stock rebuilt 302 with edelbrock 1406 600cfm carb and a manual fuel pump. The issue is after it sits for a few days, I can't get it to start without pulling the fuel line at the carb. I have an inline glass filter before the carb so it's getting fuel. So I crank it over a bit, then pull the fuel line off and it has pressure on it. A small amount of fuel comes out of the fitting, hook line back up and it starts right up. There doesn't appear to be any blockage or anything, so the only thing I can think is air in the line is causing the issue because the fuel seems to be draining back past the pump. Any ideas?

 

[patterdale]

Could be a weak mechanical pump draining back or leak in a line some where. Had similar problems and replaced the pump. Problem solved.

 

[savage]

One thing I would do is get rid of the glass fuel filter, and put a metal or plastic one on.

 

[TXBronco 67]

Thanks, I'll change the filter and pump to see if it fixes the issue. The pump isn't very old, but it's worth try...thanks again

 

[TXBronco 67]

I put a new inline metal filter before the carb and replaced the line from the pump. Problem solved! No blockage on the old stuff so I'm not sure what the deal was...

 

[jckkys]

The fuel in the float bowls evaporates. In hot weather it's gone in a day or two. In cold weather it takes a week or more depending on how cold and the fuel blend. The engine needs to be cranked few seconds to refill the float bowls. In the Az desert this has always happened to carbureted vehicles, that aren't driven daily.

 

[Rustytruck]

Maybe just a leaky hose or hose clamp. Check all hoses and clamps from the tank to the carb. Pull the dip stick and smell the oil for raw fuel in it. A failing fuel pump only has 2 paths they either dump fuel out the exterior weep hole or pump fuel into the crank case. I once rebuilt a motor that the fuel pump failed into the crank case and was driven full of fuel. The inside of the engine was as clean as new. The bearings and rings were wasted but it was an easy rebuild.

Glad you got it back up and running.