Technical Carburetor, Left Turn Stumble ??

I have a Holley 4160, I have had it since 2008.
I had it rebuilt 5 years ago.
It has always work fine until recently, Found the problem to be a dried up accelerator pump diaphragm and the power valve diaphragm was getting stiff.
I replaced both components.
Now the carb has developed a new issue ,,,, left turn stumble.
This is a new one on me, What causes a stumble only on a left turn?

 

Usually it's the float level setting.

 

I agree. HRP

 

Ditto from an old Holley guy....

 

I thought this was going to be a Carter AFB for sure but nope...

 

Another vote for float level.

 

Ditto on the AFB.

 

Agreed with above float level setting. Side-hung floats give you troubles in corners, center hung floats give you troubles on acceleration/deceleration.

 

I had a flying ant or insect of some sort find its way into the primary bowl of a 600 vac. Ended up stuck in a main jet and caused a similar issue.

 

Agree with the others. I had the same issue on my 55 F100 and a float adjustment resolved it. Hopefully this will be the same for you.

 

Yep! What they said...... Also re-adjust the acc. pump arm so you have .015-.020" clearance at wide open throttle when you bolt the float bowl back on the carb....

 

Did you get it fixed????......

 

Thanks for the tip, will have to make some adjustments.

 

Cool!... Let us know how it runs when you git it done please... Thanks!...

 

Fuel pickup in the tank broke off.

 

Carb was on a slow death to rebuild.
Throttle body flooded itself in short order.