Where in the rev range are you?

[7db]

In any case, you know my views on engine braking

Well there are engines and there are engines.
And there's fuel consumption and there's fuel consumption.

[sussex2]

In Spain it is not at all unusual for people to 'coast' downhill in the belief they are saving fuel.
This may be been the case in the days of cars such as this: http://classichub.wordpress.com/2011/01 ... n-a-theme/
However and thankfully things have moved on - a lot.

[7db]

You must have knocked the dump valve.

[waremark]

Sorry to be catching up a few days late. The gnome suggested to me that you should generally keep the revs between peak torque and peak power.

Of course it depends but I am generally a lower rev user - only go above two thirds when looking for max acceleration, which I hardly ever do in a high performance car when limited to 60 mph.