Fuel pressure reg info

[isham-research.freeserve.co.uk at pop.pol.net.uk]

> Test driving with the bypass switch closed gave good full throttle
> performance. The WOT switch has checked out perfectly in the garage time
> after time. Go figure.

Don't need to.  Late switching is a failure mode.  Don't quote me, but
ISTR that the full-load switch should close at 63 degrees of throttle
opening.  A couple of years ago I made up a WoT bypass switch from
junkyard parts:

http://www.isham-research.freeserve.co.uk/quattro/wot_by.jpg (136KB)

The switch is a push-to-make intended for an instrument front panel. Its
diameter, even sleeved as it is, is small enough for it to pass through
ur-quattro bonnet louvres.  It's long enough to be operated by the
driver to simulate a 'good' WoT switch - although that's not why I
originally made it.  Its original purpose was to pull diagnostics from
a KG engine 'in-flight' - this is triggered by closing idle and WoT
switches simultaneously.  Even though the KG uses two microswitches
instead of the failure-prone Type 1 WoT switch, the connector and wiring
are the same.

With the diode light attached to the WGFV, the bypass switch attached to
the throttle body, and a 6" dial boost gauge, it's easy to demonstrate
the benefits of replacing the WoT switch to an owner.

These days I would almost go as far as saying: "If your WoT switch has
a seam along the middle of each side, just replace it.  If it hasn't
failed yet, it will."  The Type 2 has no such seam - the cover slides
over completely and is potted.

The lower mounting screw, BTW, is a classic for shearing off because
of galvanitic corrosion.  Even if you don't change an old switch yet,
give the lower screw a precautionary spray of penetrant.

--
 Phil Payne
 http://www.isham-research.freeserve.co.uk/quattro
 Phone +44 7785 302803   Fax: +44 7785 309674