My erudite friend, DSP is correct.....it is an idle fuel/air circuit shut off valve.
Closed with ign' off. Prevents run on after koeo.


Most all european manufactured carb's for cars/trucks had one installed from about 1968 on. Pierburg/Solex etc..... with the exception of S.U. who used a manifold air valve that was open with koeo.. Ford used one too, to stop the engine running on with the crappy ( Constant depression. ) variable choke Autolite carb, ie: Escort/Mexico/1.3/1.6/2000etc .





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