Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > 911 / 930 Turbo & Super Charging Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
89 930.
 
Benny771's Avatar
 
Join Date: Jul 2008
Location: Canada Ontario
Posts: 783
Garage
Question What are and what do they do?

Is there a way to test these? Previous owner must have done work to these?
Is there anyway these may have something to do with low warm-up idle?
Car idle's low and rough untill totally warm. 10 min drive.



Old 07-26-2011, 05:56 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Banned
 
Join Date: Nov 2007
Location: Rockwall, Texas
Posts: 8,760
There is quite a bit of info about those in this thread:

Solenoid to dizzy vacuum line
Old 07-26-2011, 08:18 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
89 930.
 
Benny771's Avatar
 
Join Date: Jul 2008
Location: Canada Ontario
Posts: 783
Garage
Great info thanks.
I still dont know what they are called? Checking price here.
Also how long they are used, 1min,10min ?
Old 07-26-2011, 08:50 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Registered User
 
Join Date: Jul 2006
Location: S. Florida
Posts: 7,289
not sure what parts listings call them but they are vacuum solenoids or you could describe them as single pole double throw vacuum switches with one side being vented to atmosphere.

they are wired in parallel so they both switch vacuum at the same time about 1 or 2 minutes after a cold start.
left one switches the air pump diverter valves and the right one blocks vacuum retard from reaching the distributor vacuum retard pot after a cold start so the timing advances a little which makes idle speed raise a few hundred rpms.

if you need more you'll find them in CIS K-jetronic Mercedes in junkyards and probably other cars with CIS, air pumps, and catalytic converters.
Old 07-26-2011, 10:32 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
89 930.
 
Benny771's Avatar
 
Join Date: Jul 2008
Location: Canada Ontario
Posts: 783
Garage
Fantastic,

Thanks for the info.
Old 07-26-2011, 10:43 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Registered
 
Join Date: Dec 2004
Posts: 734
Change over valve

Old 07-26-2011, 11:13 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 01:17 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2020 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.