 Vacuum hose diagram for '72 1.7, where to find? |
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| jeremiah98125 |
 Mar 30 2010, 12:16 PM
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#1
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jr  Group: Members Posts: 37 Joined: 11-November 09 From: seattle, wa Member No.: 11,031 Region Association: Pacific Northwest  |
Can someone tell me if there's a GOOD complete vacuum hose diagram available for the '72 1.7? Besides Pelican site, Haynes & Drake manuals please.. They all leave out some of the hoses and are incomplete for my model. The Porsche shop manual any better? Somebody draw up a good one?
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| JeffBowlsby |
Mar 30 2010, 01:41 PM
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#2
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914 Wiring Harnesses Group: Members Posts: 8,484 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None 
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Here is a diagram for 1970-71 cars. and some additnioal documents. It looks like the differences in the 1972 hoses may be the decel valve, the PCV-system hoses and some hoses at teh airfilter. Can yuo make a good diagram up and post it? None currently exists that I have ever seen.
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| JeffBowlsby |
Mar 30 2010, 01:42 PM
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#3
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914 Wiring Harnesses Group: Members Posts: 8,484 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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Mo'
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| JeffBowlsby |
Mar 30 2010, 01:42 PM
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#4
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914 Wiring Harnesses Group: Members Posts: 8,484 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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Mo'
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| JeffBowlsby |
Mar 30 2010, 01:43 PM
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#5
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914 Wiring Harnesses Group: Members Posts: 8,484 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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Mo'
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| RacingDreamz |
Jun 5 2016, 08:57 PM
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#6
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Member Group: Members Posts: 62 Joined: 21-May 15 From: Mountain City, Tn. Member No.: 18,747 Region Association: South East States |
QUOTE(Jeff Bowlsby @ Mar 30 2010, 03:42 PM)  Mo' In this image, the part that is #10, is this right beside the fuel pump? There is a hose that was extremely loose at the top and the end of the hose went to something in the middle part of the engine area but for the life of me, I cannot find where it goes. Any suggestions? It says in image that it connects to the 'additional air regulator'. What if you dont have the 'additional' air regulator? |
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| Dave_Darling |
Jun 5 2016, 09:52 PM
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#7
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914 Idiot Group: Members Posts: 14,981 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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#10 is the Decel Valve. It opens when there is very high vacuum in the manifold, to allow air to bypass the throttle body.
The "additional air regulator" is what we usually call the AAR. It allows air to bypass the throttle body when the engine is cold, and closes off as the engine warms up blocking that extra flow. The AAR is part #5 in that same diagram. --DD |
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