Technical 28S1A carburetor Electrojet plug.

[Ciao fiat]

I have at fiat motor 126 A1 00 with a 28S1A made in Poland electrojet carburetor. I have a few questions about this carburetor, first what does the electrojet do? 2nd there is a spade terminal on the electrojet, does it take ignition switched power? Finally, where can a replacement electrojet be purchased from? Any and all help is greatly appreciated.

 

[RalphM]

I don't know but if I had to guess I would think it is a electronic choke/cold start system.

 

[Ciao fiat]

I don't know but if I had to guess I would think it is a electronic choke/cold start system.

You are absolutely correct Ralph from everything I have read. I am having a hard time trying to find out where it gets plug in and how it gets its power. I have the Fiat 126 manual 1973 through 1987 all models 594 and 652 cc. I went page by page and nothing mentions the 28S1A carburetor or the Electrojet. I'm looking for that location or at the very least if its powered with ignition power.

the carburetor has a polish stamped so I'm not sure why that carb is not mentioned in the manual.

 

[124BC1]

Your carb, 28S1A, is made by FOS in Poland - it is not a Weber carb as fitted on Fiats., which might be why it's not mentioned in your workshop manual?
This carb is listed as being fitted on the 126EL model - some Fiats were made in Poland under licence from Fiat, and afaik, the Poles modified some of these models e.g. 126P.

That 'Electrojet' component reminds me of the 'idle fuel cut-off' devices that were fitted on some other Fiat models, it's purpose was to cut the idle fuel supply immediately when the ignition was turned off to prevent the engine 'running-on'.
It appears to be installed where the idle jet holder would normally be fitted on a Weber carb, so I don't think it's any type of electro choke. It there a choke cable connected to a unit on the side of the carb?

Idle fuel cut-off valves are known by various other names e.g. anti-run-on valve; idle electro(magnetic) valve etc.
The valve is designed to close off the idle fuel circuit - so normally closed with ignition off and then opens when ignition is turned on.
It's operation can be checked by applying and then disconnecting the power e.g. turn on ignition, then turn off. You will probably be able to hear the solenoid in the valve move or feel it if you touch the valve body. Alternatively, remove the idle cut-off valve and apply power to check it's operating correctly.

As regards sourcing a new replacement, perhaps one of idle cut-off valves for some of the other older Fiat models might fit and work?

 

[Ciao fiat]

Your carb, 28S1A, is made by FOS in Poland - it is not a Weber carb as fitted on Fiats., which might be why it's not mentioned in your workshop manual?
This carb is listed as being fitted on the 126EL model - some Fiats were made in Poland under licence from Fiat, and afaik, the Poles modified some of these models e.g. 126P.

That 'Electrojet' component reminds me of the 'idle fuel cut-off' devices that were fitted on some other Fiat models, it's purpose was to cut the idle fuel supply immediately when the ignition was turned off to prevent the engine 'running-on'.
It appears to be installed where the idle jet holder would normally be fitted on a Weber carb, so I don't think it's any type of electro choke. It there a choke cable connected to a unit on the side of the carb?

Idle fuel cut-off valves are known by various other names e.g. anti-run-on valve; idle electro(magnetic) valve etc.
The valve is designed to close off the idle fuel circuit - so normally closed with ignition off and then opens when ignition is turned on.
It's operation can be checked by applying and then disconnecting the power e.g. turn on ignition, then turn off. You will probably be able to hear the solenoid in the valve move or feel it if you touch the valve body. Alternatively, remove the idle cut-off valve and apply power to check it's operating correctly.

As regards sourcing a new replacement, perhaps one of idle cut-off valves for some of the other older Fiat models might fit and work?

Thank you for the explanation!...great information, more than I found on the internet. I do have a choke cable attached on the other side of the carb and will give it some power to see if it operating correctly. My fear was applying too much power and burning it up, but since it is ignition power that helps out...hopefully it still works and I get it running.