Yes that hole to the evap valve should be partially blocked. You should hear
the valve open when the throttle is opened and close when the throttle is
closed. Also on the 1.9 engines the port is also used for the distributor
vacuum advance.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
neil n
Sent: Tuesday, July 03, 2012 6:39 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Throttle Valve Stop Screw Adjustment.

Hi all.

When idle stop screw is set correctly, should the throttle valve be blocking
the EVAP (canister purge) hole in throttle body?

I removed a small divot worn on face where stop screw rests. This divot
would allow the stop screw to compress my 0.076 mm feeler gauge a little and
leave a dent.

The idle stop screw had red adhesive keeping it in place. I am checking,
resetting this screw and will reapply adhesive of some kind.

Possibly moot given the throttle body wear but  it seems to me that the
valve is thick-ish at that point to stop a vacuum from being applied to the
EVAP canister purge valve.

Thanks

Neil.

--
Neil n

65 kb image Myford Ready For Assembly  http://tinyurl.com/64sx4rp

'88 Slate Blue Westy to be named.

'81 VanaJetta 2.0 "Jaco"  http://tubaneil.googlepages.com/

Vanagon VAG Gas I4/VR Swap Google Group:

http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engine
s