On Fri, Aug 29, 2008 at 10:25 PM, Dennis Haynes <d23haynes57@hotmail.com>wrote:

> Engine braking is strictly a function of the closed throttle causing high
> manifold vacuum as the engine is being driven by the wheels. Yes, engine
> braking is caused by vacuum, not compression.
>

What I meant to ask, is whether the ECU still shuts off fuel to the
injectors above the cutoff (I thought it was 2000rpms?) at zero throttle
even if it is not yet in closed loop mode.  It makes sense that it would, I
just can't verify this with the mixture meter since the o2 sensor is
nonfunctional at this point.