[Vwdiesel] torque drop in warm weather, was....

[Shawn Wright]

This sounds nearly identical to the cold start warm air valve found on
many gas VWs - there is a thermostatically controlled spring which closes
the flap once the air has warmed up, but until then the warm air from the
exhaust helps to warm up the engine faster. Probably another attempt to
improve emissions on the ECO, and help get Cat working sooner.

On 15 Apr 2003 at 5:35, Scott Kair wrote:

>      A timely thread.  When I was changing my air filter over the weekend I
> looked over the air box on my 92 Jetta ECO.  Very interesting arrangement.
>     One inlet seems to be from the grill.  There didn't seem to be much
> deterioration of the foam seal around it, as mentioned previously.  But
> there was also some sort of intake horn pointing towards the rear of the
> engine, towards the exhaust manifold.  It ends in the filter box at a
> spring-loaded door.
>     Bentley didn't seem to mention it.  What would this one be for- a heated
> air intake?  Perhaps the intention is to allow supplemental intake under
> load?  I'd attributed power loss above 85F to running the a/c, but this has
> me wondering.
>     TIA
>     Scott Kair
>
>
>
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>

Shawn Wright
http://Zuiko.sls.bc.ca/swright
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