[Supras] VSV2 purpose

[berniek at technicaldevelop.com]

Marty:

    Somehow you always come through with answers that make sense.  
Thanks.  I'm relocating both of the solenoid valves (this one and the 
one for EGR which you may be fortunate to not have to the top of the 
intake manifold for ease in future servicing. Its hard enough to get to 
the bundle of steel and rubber tubing under where the top and bottom 
intake manifolds join.

    Take care.

       Bernie

Supras Ireland Admin wrote:
> Bernie, I believe the VSV in question is also to Aid hot Starting. When the
> engine is hot, the VSV will stop
>  vacuum being applied to the FPR keeping it at base pressure - during hot
> starts the 7m can suffer from fuel evap causing difficult starts, the VSV
> insures a higher fuel pressure at rail during these conditions.
>
> Marty
> SSi
>
> -------------------------------------------------------------
> ----- Original Message -----
> From: <berniek at technicaldevelop.com>
> To: <Supras at supras.com>
> Sent: Monday, September 03, 2007 10:11 PM
> Subject: [Supras] VSV2 purpose
>
>
>   
>> Solenoid valve VSV2 Front, under intake manifold on turbo version
>> appears to interrupt the manifold pressure signal to the fuel pressure
>> regulator and vent the FPR diaphragm to atmosphere?  .  Presumably this
>> is to richen the mixture since the engine is started with the throttle
>> closed.  But if so, why also have the cold start injector?
>>
>> When upgrading to a Walbro pump and 550cc injectors, has anyone had
>> experience in removing the solenoid valve?
>>
>> Thanks.
>>
>>
>>
>>
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>>     
>
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