[Vwdiesel] Why gasss cars mpg sucks

[SLATERSFB at aol.com]

Bosch Jetronic & Motronic injection systems on gassers do the same thing. 
Above 2 thousand rpm, if the throttle is closed, injectors are shut off. Late 
model TDI's with electronic injectors seem to use similar engine management, 
minus throttle plate.

Bob




> 
> 
> >A couple of things...first, the TDI DOES shut off all injection
> >in a coast operation.  I've observed that, and verified it as
> >correct behavior for the TDI.
> >
> >
> 
>  So when you top over a hill, (and keep going of course)  the TDI 
> engine actually shuts off?  Seems like something DOT wouldn't 
> approve of regardless of ramifications or not.  Seems like a 
> freewheeling (ala E-mode) would save even more fuel.  If that's 
> the intent.
>   Loren
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