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Apparently decel fuel cutoff goes back quite a long way. I just checked my 1996-1998 Civic service manual since that's the oldest one I have access to at the moment and here's what it says about decel fuel cutoff:
"3. Fuel Cut-off Control
. During deceleration with the throttle valve closed, current to the fuel injectors is cut off to improve fuel economy at
speeds over the {ollowing rpm:
. D16Y5 engine (M/T): 850 rpm
. D16Y5 engine lCVT), D16Y8 engine (USA M/T)r 920 rpm
' D16Y8 engine (USA A,/T), Dl6Y7 ensine (USA A"/T):910 rpm
. D16Y8 engine (Canada M//T), Dl6Y7 engine (Canada):990 rpm
. D'16Y8 engine (Canada M/T): 1,000 rpm
. Fuel cut-off action also takes place when engine speed exceeds 6,900 rpm (D16Y5, Dl6Y7 engine; D16Y8 engine:
7,000 rpm), regardless of the position of the throttle valve, to protect the engine from over-revving."
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