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Author Topic: vacuum routing 1979 w-72  (Read 10990 times)

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Offline ta78w72

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Re: vacuum routing 1979 w-72
« Reply #15 on: June 18, 2011, 09:43:02 PM »
Quote from: drtracer58 on June 18, 2011, 09:29:21 PM
Now I am really confused  ???   Quote from 79 manual : The DS-VMV limits the distibutor spark vacuum to a calibrated value until ported vacuum applied to the control port of the DS-VMV is greater than the calibration value  ???      THAT SURE WENT OVER MY HEAD ......   

I think it means that valve limits the vacuum advance until the ported vacuum is over a certain value.  But I have to admit, I don't understand all the functions of all the vacuum lines and valves.
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Offline Burd Turd

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Re: vacuum routing 1979 w-72
« Reply #16 on: June 18, 2011, 10:19:57 PM »
Did you read that in th 1978 New Product Info. manual, that's confusing :P
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Born and Raised in South Detroit Bitches

Offline drtracer58

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Re: vacuum routing 1979 w-72
« Reply #17 on: June 18, 2011, 11:43:25 PM »
I read it out of a " 79 " Manual, But it looks to be the same text ......... Whew !!!   I need a interpretur
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79 WS6-W72

Offline drtracer58

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Re: vacuum routing 1979 w-72
« Reply #18 on: June 18, 2011, 11:46:27 PM »
Burd..  I just noticed your page refers to a Automatic,    Mine is a 4-speed  ?????????????    Please speak up John W.....
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79 WS6-W72

Offline ta78w72

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Re: vacuum routing 1979 w-72
« Reply #19 on: June 19, 2011, 10:45:30 AM »
The 78 automatics had the VS-VMV, the four speeds didn't.  It appears from the 79 service manual that the four speeds got them in 79.
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Offline drtracer58

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Re: vacuum routing 1979 w-72
« Reply #20 on: June 19, 2011, 01:31:33 PM »
That makes me feel better that you agree with what I was seeing,   Thanks TA78
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79 WS6-W72

Offline Burd Turd

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Re: vacuum routing 1979 w-72
« Reply #21 on: June 19, 2011, 05:35:58 PM »
Well i looked in the parts book and they have a page that has all the emissions parts, maybe you can figure it out from this


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Born and Raised in South Detroit Bitches

Offline drtracer58

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Re: vacuum routing 1979 w-72
« Reply #22 on: June 20, 2011, 05:18:34 AM »
Thanks, It will help   I think I need one that looks like part # 10002947
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79 WS6-W72

Offline dreamn2

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Re: vacuum routing 1979 w-72
« Reply #23 on: June 20, 2011, 09:56:23 PM »
I will try to get some better pics and post them up for you tomorrow evening. I am not sure my car still has all the items you are discussing, but it appears to.
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79 TATA
79 Platinum W72 Formula

Offline johnc9909

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Re: vacuum routing 1979 w-72
« Reply #24 on: May 28, 2012, 07:48:18 PM »
I have a 79 with a 400 manual and it has headers and a lot of vacuum lines were disconnected. I found today the one that comes off distributor just laying in engine compartment. Should I plug it or route to back of carb. From diagram it looks like a ds-vmv is in place before it hits back of carb. but I don't have one. Do I need one or should i plug or route without?
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Offline drtracer58

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Re: vacuum routing 1979 w-72
« Reply #25 on: May 28, 2012, 09:42:35 PM »
seems to me that if it is just laying there, it might be a source of vacuum leak ???   or is it connected ???
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79 WS6-W72

Offline johnc9909

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Re: vacuum routing 1979 w-72
« Reply #26 on: May 28, 2012, 10:27:50 PM »
It was just laying there. I plugged it in to back of carb. and it made the idle go up, unplugged it and idle dropped way down. From diagrams I've seen there is suppose to be a ds-vmv valve before it hits back of carb. don't know if i can find one or if i really need it. Car has headers now and some emissions stuff has been removed.
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Offline drtracer58

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Re: vacuum routing 1979 w-72
« Reply #27 on: May 31, 2012, 09:35:29 PM »
Is it a open vacuum leak ????     Plug it and readjust Idle
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79 WS6-W72
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