I installedmy just rebuilt 4100 on my Galaxie, and it ran well for two days, untill this Monday, whan the car started with decreasing idle, and abig flat spot. I took the horn cover of and noticed the secondary bowl was flooding big time. Took the carburetor from the car, and examinated the float/needle assembly. All perfect and brand new.

Decided to adjust the float to lower the fuel level on the bowls a little bit. Tested the sealing before installing the carb back, and it was perfect, no leaks both, between the needle assemblys and the carburetor body, and at the needle itself.

Reinstalled the carb, and it worked good for about 5 minutes, when it started flooding again.

That's very odd. The Motorcraft 2100 I had running before never had flooding problems.

Any ideas?????

Túlio Lazzaroni "FORD", Florianópolis SC Brasil.

'74 Ford Galaxie 500 292 V8

'82 Ford Galaxie Landau 302 V8

'98 Chevrolet S10 4.3 V6

'01 Ford Focus 1.8 Zetec

Tulio: If you can't sort it out, I believe Pony Carburetors in N.Y. state are still in business. Try finding then on the web. They were acknowledged experts on those carbs, & used by many Mustang owners.

Paul

The nice thing about the Autolite carbs is that they can be run without much effort on the engine with the top of the carb off.   This might help you in determining exactly why that secondary needle seat assembly is not holding the fuel level in the right spot.  But be cautious as running the engine with the top of the carb off increases the chances for a fire exponentially.

Lorena, Texas (South of Waco)

Pony is no longer in business, hasn't been for at least 6 months as the owner passed away. I thought they were in CA or Fla.



What kind or needle does it have. These rebuilders are using these rubber tipped needles that go bad with the ethanol fuel.

54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

Greetings to all: You didn't state what float you have. If it's brass, they are very reliable. If it's the composite/plastic type, usually black in color, it's probably "gas logged." These plastic floats were very problematic even in the days before alcohol was added to our fuels. If you have access to another float, install it and see if that solves the flooding. Hope this helps and good luck.

64F100 57FAIRLANE500

I think I figured out what was happening.

The needlesd are viton pointed, and I never had problems with similar needles before.

The carburetor body itself, I bought some time ago from Gottafish, as they were the only ones that didn't want a core, and would garantee the carburetor had no cracks, or deformations. It also came with the brass floats, and at the time, was the single 1.08 I could find for sale.

Well, I took the carburetor apart to double check it, and found some sand from the sandblasting inside the secondary venturis. Got that cleaned out with pressurized air, and couldn't find any more remains of sand inside the carb. I even took the jets off to clean the passages.

What happened was that some residual sand could still be found inside the main fuel line between the two bowls, and that sand came out with the car running, and found it's way into the float's axle, what was keeping the float from closing the needle.

This happened about four times!!!! Untill I pressure cleaned the mail fuel line on the carburetor, and now the problem seems to have vanished.

Just hope all the sand the engine "ate" didn't damage the cylinders.

Túlio Lazzaroni "FORD", Florianópolis SC Brasil.

'74 Ford Galaxie 500 292 V8

'82 Ford Galaxie Landau 302 V8

'98 Chevrolet S10 4.3 V6

'01 Ford Focus 1.8 Zetec