Carter AVS running/starting issues

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One thing that always got me itching for an answer is, recently swapped from a 2 barrel Stromberg WWC to a Carter 4 barrel AVS.

Put a rebuild kit on the AVS, and the question is: the accelerator pump discharge does not squirt fuel in the venturi even though the discharge nozzle check valve is free moving AND there is some fuel present In the float bowl.

Can and is the accelerator pump well supposed to refill with fuel from the adjacent float bowl check valve to admit fuel in after the throttle is closed?

In my case, the accelerator pump well does not refill.

I'll change the discharge nozzle check valve with the ones you usually see on a typical Edelbrock.

(Weighted pintle needle to the ball and weight style)
 
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Longshot answer, fuel line that goes up to the carburetor could possibly need to be primed & filled with fuel? To effectively allow the carburetor to "pull" fuel into the engine via engine cranking vacuum.

Otherwise the pump is not pumping anything at all aside from air.
 
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Hopefully last update, fuel pump push rod correct length of 3.22.

Fuel pump output bucket test, little to no fuel comes out.

Fuel present in gas tank, any rubber hose from the tank to the carburetor has been replaced.

I am now suspecting the brand new fuel pump is faulty/torn diaphragm.

I'll retrace and inspect the carburetor float settings and anything that will not admit fuel near or in the carburetor.
 

57fury440

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Fuel is not going to be pulled into the engine. It sounds like your fuel pump is not working. With the fuel pump connected and the line to the carb. disconnected it should shoot gas out easily. If it was my car, I would hook up a cheap electric fuel pump ( $10- $12 bucks on ebay ) to get the car started. If you have a compressor, use it to blow out the line going from the tank to the pump to make sure it is not clogged. As far as the carb. goes you need to get fuel to it to determine what is and is not functioning properly.
 

CBODY67

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What about the piece of rubber fuel line back at the tank sending unit? And the one at the rh rr of the stub frame?

Just curious,
CBODY67
 
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Fuel is not going to be pulled into the engine. It sounds like your fuel pump is not working. With the fuel pump connected and the line to the carb. disconnected it should shoot gas out easily. If it was my car, I would hook up a cheap electric fuel pump ( $10- $12 bucks on ebay ) to get the car started. If you have a compressor, use it to blow out the line going from the tank to the pump to make sure it is not clogged. As far as the carb. goes you need to get fuel to it to determine what is and is not functioning properly.

Just figured out the problem most likely.
It's the new accelerator pump that got stuck in it's bore so there was no fuel squirt.
 
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PROBLEM FOUND.
It was the new accelerator pump I acquired & installed from Mike's carb parts.

Put the old original worn out accelerator pump back in, the discharge nozzle now squirts fuel.
(This is a recurring trend/issue with the accelerator pumps, I rebuilt a stromberg WWC a while back and had the same issue. Problem was the new accelerator pump seizes everytime the accelerator was pressed, and blocks the check valve to NOT allow the fuel to flow into the pump well. Similar story with this Carter AVS. Any way I digress)

I reckon the accelerator pump was too large for the pump well in the carburetor.

Shaving a couple thousands off of a new pump will make it slide freely in the accelerator pump well.

And is able to idle on it's own.
I tried revving it once the engine was warmed up and the RPM shot up to at least 1000 RPM.

Sudden engine runaway was in motion.
(Sprinted to the key to turn the car off.)

Aside from the minor heart attack, I am well on my way to get this barge back on the road!

Thank you to everyone who contributed to getting this lead sled started.

I learned quite alot within these past few weeks.

Will update if necessary if someone needs info on how and what I did to get to this point.

Thanks again everyone!
 
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A little bit smokey, burning off the residual oil spill on the manifolds.

With the Carter AVS on the motor, sounds GIRTHY, and MEAN.
IT. WANTS. TO. GO.

Oh and yes, that's chopsticks holding the choke flap partially open.
Lol.

But all is well!

20220827_204329.jpg
 
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