Re: airbox hose

["Jay D. Bichanich" <jbichanich@socal.rr.com>]

Shannon,

The only control I see to the flap (in the intake scoop thingie under the
battery) is the one white vacuum line.

How can one vacuum line 'know' whether the engine is cold or warm?  As the
engine pulls more vacuum (i.e. higher RPM), this line feeds vacuum to the flap
in the intake scoop thingie.  The flap then does something (opens or closes or
something).  Where does 'knowledge' of engine temperature come into play here?

TIA

Jay Bichanich
86.5 Scirocco 16V (original owner)


Shannon Fenton wrote:

> The rear hose runs to the exhuast/downpipe area. When the car is cold the
> flap should be open pulling in warm preheated air.
>
> Thank you for your time.
> Shannon Fenton
> Telecom Resource Management
> Amazon.com
> 206.266.6736
> sfenton@amazon.com
>

>
>
> Hey, there's a 2nd hose running from a shield on the back of the exhaust
> manifold up to the air intake 'scoop' under the battery.  There's also a
> white
> vacuum line running from the air intake rubber boot (near the throttle body)
> forward to this air intake scoop.  (In fact, this white vacuum line even
> appears
> in the 'Vacuum Routing Diagram' on the underside of the hood).  Obviously
> there's some kind of vacuum actuated mechanism in the air scoop.
>
> Anybody know what the purpose of this setup is on the 16V?  This is NOT
> described anywhere in Bentley.
>
> TIA
>
> Jay Bichanich
> 86.5 Scirocco 16V (original owner)
>


--
Email problems to: scirocco-l-probs@scirocco.org  To unsubscibe send
"unsubscribe scirocco-l" in the message to majordomo@scirocco.org