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need help sorting out my vaccume lines
I just bought a 1979 911sc. It has a surging idle. When it is reved up it runs great, but when the idle dips down it start poping through the pop off valve. I replaced the plugs, wires, rotor, cap and fuel filter with no luck. I decided to look for vaccume leaks.
I found this (Thermo valve see first pic) The vac diagram shows that the extra port should have a line going to the control pressure regulator. I think I found the CPR, but it has a vac line that runs to a "T" and spits off into another "T". I cant find any vac lines that would have gone to the open port on the Thermo valve. Does anyone have any pics of their vac line set-up? Mine is different to how the diagram is showing.  
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2004 SRT-10 Viper powered ram 2006 Hummer 1989 Mustang supercharged 5.8 351 TKO600 5 speed 1987 Buick Grand National 1979 Porsche 911 SC work in progress |
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07-03-2008, 06:55 PM
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I found a great diagram
http://www.pelicanparts.com/911/911_Parts/1978-83/1-7-2.JPG Is #54 the control pressure regulator? Is #17A the thermo valve I have in the first pic?
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2004 SRT-10 Viper powered ram 2006 Hummer 1989 Mustang supercharged 5.8 351 TKO600 5 speed 1987 Buick Grand National 1979 Porsche 911 SC work in progress |
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07-03-2008, 07:12 PM
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Location: Capistrano Beach, Ca.
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Yes and yes.
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L.J. Recovering Porsche-holic Gave up trying to stay clean Stabilized on a Pelican I.V. drip Last edited by ossiblue; 07-04-2008 at 07:07 AM.. |
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07-04-2008, 07:00 AM
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VACUUM lines...
Is there a diagram on the underside of the engine cover? |
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07-04-2008, 07:08 AM
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Quote:
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L.J. Recovering Porsche-holic Gave up trying to stay clean Stabilized on a Pelican I.V. drip Last edited by ossiblue; 07-04-2008 at 07:19 AM.. |
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07-04-2008, 07:13 AM
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I didnt see a part number on it, but it does have a vac line on the base that runs to the center connection on the thermo valve. It is the same line in the first pic. The diagram looks like it should be going to the other port on the thermo valve.
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2004 SRT-10 Viper powered ram 2006 Hummer 1989 Mustang supercharged 5.8 351 TKO600 5 speed 1987 Buick Grand National 1979 Porsche 911 SC work in progress |
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07-04-2008, 08:12 AM
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The diagram shows 2 vac ports on beside each onther on the side of the Throttle body, but I only see one on mine. ??
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2004 SRT-10 Viper powered ram 2006 Hummer 1989 Mustang supercharged 5.8 351 TKO600 5 speed 1987 Buick Grand National 1979 Porsche 911 SC work in progress |
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07-04-2008, 08:57 AM
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