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Registered
Join Date: Apr 2007
Location: wisconsin
Posts: 2,562
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What are these two gizmos...
Quick question, unfortunately I don't have any pics here so I will try to use my descriptive powers
 ...Can anyone explain to me what the two vacuum gizmos are, that are on the passenger rear of an 1988 930. They are little cad plated cubes, with 3 vacuum lines leading to and from them. They are located just under the intercooler. I have searched for pics on here, with no luck. I do not see pics of them in the bentley manual, or wayne's books either. I suspect they are vauccum valves of some sort. Its not a vaumn solenoid, or cold start valve, or thermo switch. Do you guys know what I am referring to? I wish I had pics.. Any idea what these gizmos do? Are they necessary? I assume they are there for emmissions purposes... |
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05-20-2010, 05:54 AM
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Registered
Join Date: Apr 2007
Location: wisconsin
Posts: 2,562
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Found this in the 930 manuals... They are aparently called the "blow-off switching valve" and "control valve."
Necessary? |
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05-20-2010, 07:26 AM
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Join Date: Jul 2001
Location: Arizona
Posts: 230
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Yes necessary and important
Last edited by J Richard; 05-20-2010 at 06:44 PM.. |
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05-20-2010, 06:41 PM
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Join Date: Jul 2006
Location: S. Florida
Posts: 7,249
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sounds like the 2 vacuum solenoids.
The left one switches the air pump diverter valves from the exhaust ports to the catalytic converter, and the right one blocks vacuum retard to the distributor for a couple minutes making the ign. timing advance a little to raise the idle a few hundred rpms for a couple minutes after a cold start. oh, and yes important if keeping all the emissions stuff working. |
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05-20-2010, 09:08 PM
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Join Date: Apr 2007
Location: wisconsin
Posts: 2,562
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Thanks guys...I have to look and see how this is all plumbed. The airpump/emmisions stuff doesn't play a role...
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05-21-2010, 06:02 AM
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