engine stall once a day?

this sounds like the old carb fault where fuel condensed onto the inside of the intake manifold causing an exessively rich mixture .if so then the fault lies in the air intake temp sensor.it may not even show up as a fault in the engine diagnostics as for the most part no fault exists.id have the injector ultrasonicly cleaned and if no joy id renew intake air temp sensor

caine
July 2008