A couple of times recently the engine has idled on for another 1/2 a second before shutting down, triggering a notice on the dashboard (engine electronics or such).

Before I buy a new fuel cutoff valve, is there anything else to consider? It did it today, and the ECU decided that I couldn't have a turbo as well :/ Presumably some kind of limp home mode, although I had all the gears.

Check for any fuel leaking at the SOV connection to the IP. A failing oring sometimes causes a delayed shutdown.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)