Fuel Issues

[JumboFett]

Hey y’all,

 

I’m trying to figure out if I need a new fuel pump.

 

Among several other upgrades, I replaced the hitachi with a Weber, and I haven’t started the car since July. I’m finally ready to start it, but it just can’t crank enough to get fuel into the bone dry carb. I pulled a hose in front of the pump, and that side is dry too.

 

Before I started taking stuff apart the pump was working, and I didn’t touch it during my tinkering. 
 

Also, before anyone asks, yes, there is plenty of fuel in the tank. And yes, I’ve been using starter fluid. 
 

Thoughts? 🤔

 

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[thisismatt]

Put suction side of pump directly into a can of gas to make sure it'll suck. If that works, likely sucking air or a clog somewhere between tank and pump.

[datzenmike]

There will be at least 3 hoses and 6 hose clamps on the suction side. If there is a small leak air will get in and if the truck sits a long enough time the fuel will siphon back into the tank, or mostly. Takes a lot of engine cranking to suck it back up hill, fill the filter and get to the pump.

 

I had one like this. If the car sat it was a huge amount of starter cranking. It was faster to dribble gas down the carburetor. It would fire up briefly on this and when revved up the pump would be able to do it's job.

 

Try that. Once the lines are full it should be ok.

[RyanC]

I had to siphon mine through to the pump outlet on mine then she was fine.

[banzai510(hainz)]

pour some gas in carb to get it running then it might suck up some gas

Unless its plugged

[Beer Snob]

Same problem on my project truck. Had a bad gasket seal on my sediment bowl. You won't have one on 620 but suction is damn near impossible with any leaks in the system.  Once I sealed up my leak it picked up fuel lickety split.

[banzai510(hainz)]

11 hours ago, Beer Snob said:

Once I sealed up my leak it picked up fuel lickety split.

Yes make sure the intake hose side dont have a crack. Otherwise no matter how many pumps you put in it will only suck air,

I had a cracked line right at the pump and didnt see it.