<VV> Fuel pump question - Part 2

[Charles Lee]

To check fuel line from front to back, I installed an electric fuel pump in the engine compartment to see if it would draw gas through the line.

 

It did not.

 

However, I’m told that the electric pumps “push” fuel and might not “pull” fuel from the front to back?

 

If that’s true, the fuel line MIGHT be OK, just need to “push” fuel (or air) through from the tank end, to test or force obstruction out?

 

Thanks again!

 

Charles Lee

 

From: Michael Kovacs [mailto:kovacsmj at yahoo.com] 
Sent: Sunday, June 02, 2019 8:32 AM
To: virtualvairs at corvair.org; Charles Lee
Subject: Re: <VV> Fuel pump question

 

 First check to see if there is fuel in the tank, probably is. If you have a compressor, you can pressurize the tank a bit. I just wrap cloth around the air hose to partially block the air from escaping too much.

 

  Disconnect the fuel line from the tank from the pump. 

 

 If no fuel spurts out of the line at the pump, the line is clogged. I never had a clogged fuel line in 50 years. Is the pump properly pushed all the way down and the set screw  located properly?  I had this problem once.

 

On Sunday, June 2, 2019, 9:24:54 AM EDT, Charles Lee via VirtualVairs <virtualvairs at corvair.org> wrote: 

 

 

I just bought a fairly nice '65 Monza 110 coupe and this is another

question:

 

After cleaning up and "rebuilding" both carbs, the engine runs long enough

to drain the fuel bowls that I've re-filled several times.

 

Suspecting the fuel pump, I replaced it, but the problem persists.

 

So, I disconnected the outlet from the pump to the left side carb to see if

and fuel pours out when I crank the engine, but none comes out.

 

The fuel pump seems to have a bit of suction at the input port when I crank

her over, but maybe not enough?

 

Is there a way to measure the vacuum that should be drawing fuel from the

tank?

 

I used an electric fuel pump on the line that comes from the tank, to see if

it would draw fuel up into it, but no fuel comes out of the electric pump.

 

 

A)  Does the electric pump need to be "primed"?  (unlikely)

 

B)  Does this indicate a blocked fuel line from the tank?  (more likely)

 

 

I'll climb under her to check out that front-to-back fuel line, if electric

pump DOES NOT need to be "primed" and is indicative of a blocked line?  

 

 

I may install the electric pump but want to clear up any other problems

first!

 

 

Thanks for any insights!

 

Charles Lee

 

 

 

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