Re: 200q stumbling/hesitation

[mallick@NetHeaven.com (John and Barbara Mallick)]

Sorry...my error!  I was thinking about the wastegate frequency valve 
which *does* have an electrical connection to it.  Mea culpa!

The bypass valve dumps boost back into the inlet of the turbo so that it can
"freewheel" during the time when the throttle plate is closed (high vacuum).

I think that the Saab 900 Turbo uses the same part (Bosch), and it may be
cheaper to get it from the Saab dealer.

John Mallick
'91 200q
>>turbo bypass valve.  While I was at it, I pulled the bypass
>>valve out and flushed it with WD40 and some Teflon based oil, then cycled
>it
>>a few times by applying 12Vdc to the terminals.  
>John, 
>I don't quite understand why you flushed the turbo bypass valve with WD40?
>the turbo bypass valve is a vacuum diaphragm valve that is connected to
>your "turbo out", at idle the vacuums pulls the valve open and the boost is
>dumped. 
>Where is the boost dumped? 
>I am not aware that there is an electrical connection in the  bypass boost
>valve, please clarify.
>I am thinking about adding an valve to my 5K.
>TIA
>Avi Meron
>86 5Kcstq  
>
>