[Vwdiesel] Need Some Clarification !

[Lee Hillsgrove]

> > Larger fuel pump? Why is this? My Dad's noticed his '02 auto gets worse
> >  mileage (about 45-48mpg imp)  than his '01 5sp (50-55mpg imp) (both
> >  Jettas), but I'd have thought this wouldn't matter to the fuel pump...
> >
>   Automatics do traditionally make a bit lower mileage than a standard,
> across the board.
>   Likely it uses a larger pump plunger to give it a bit more power, to
help
> compensate for the acceleration losses from the torque converter. Just
> a guess though.



  Autos and manuals have the same hp and torque rating, IIRC. The autos use
smaller injectors and a larger 11mm pump, compared to the manuals which use
10 mm pumps. You can bump up power on an auto by using stock manual
injectors, or on a manual by using either larger than US stock injectors or
by using an auto pump, or if you're brave enough and have a large enough
tolerance for smoke, both.  :-))
 The auto trans really eats into the mpg. Blecchh.

  Lee
  Oo-v-oO
  PP-ASEL
  KB1GNI