That residue is caused by blow by from the engine. It is a moisture of some
fuel, oil and water vapor. If the sludge is getting into the AFM than you
should check the engine for excessive blow-by, (leak down test). This can
also be caused by short trip driving, excessive oil level RPMs etc.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]On Behalf
Of Chad G
Sent: Sunday, September 09, 2001 8:16 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Throttle valve housing question......

As an attempt to remedy crap fuel mileage I took a look inside my throttle
valve housing (I've done everything else I could do..........replaced the
following: 02 sensor, both temp sensors, thermostat, H2O pump, plugs, wires,
distributor and rotor, air filter, cleaned FI grounds) and notice an oily
gas puddle inside of it.  WHY WHY WHY...........is it supposed to be like
that????
there was also a bit of the same inside the AFM......

help

Chad 85GL