how about the rubber "gasket" between TB and plenum?

alistair

On 2012-06-24, at 9:38 PM, neil n wrote:

> Hi all.
> 
> Ok. Using what I had on hand (measured to ensure this LED drew low
> milliamps, though this was @ 12V).....
> 
> 12V LED, + lead to TVS + ,  LED goes on, throttle at rest, throttle valve
> switch closed, and goes off, throttle opened TVS open. Most importantly,
> for my purposes, LED indicates that TVS is closed even when engine is
> surging, foot off gas pedal. But....
> 
> What is that whistle sound at ~ 39" - 55" ?  Vacuum leak?
> 
> TB gasket is new, rubber hoses at EVAP hoses, FPR, PVC "T", all good. Air
> distributor has no holes. Immediately noticed whistle while driving with
> engine lid off. Did not hear it revving engine in driveway, lid off.
> 
> Red LED is mid screen at full screen view.
> 
> http://www.youtube.com/watch?v=IQwCxo9Mzho
> 
> 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-engines