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#1
10-11-2020, 05:01 PM
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Does anyone have the vacuum hose diagram for a 1974 400 4-speed?
I am ready to install my new vacuum hoses on the '74. The factory service manual does not show a diagram for a 400 4-speed car and the one 4bbl diagram they have shows a dual diaphragm EGR valve which mine does not have. I heard the 1974 Pontiac Exhaust Emissions booklet shows the correct diagram. Anyone have this that can post up the pic? Thanks!
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1970 Trans Am 1971 Trans Am 1974 Trans Am 1978 Y88 Trans Am W72/auto 1979 10th Anniversary Trans Am 1984 Trans Am 1993 Trans Am 1999 30th Anniversary Trans Am 2001 10th anniversary Firehawk #104 2006 GTO |
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#2
10-11-2020, 05:41 PM
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#3
10-11-2020, 07:05 PM
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Sent!
__________________
1970 Trans Am 1971 Trans Am 1974 Trans Am 1978 Y88 Trans Am W72/auto 1979 10th Anniversary Trans Am 1984 Trans Am 1993 Trans Am 1999 30th Anniversary Trans Am 2001 10th anniversary Firehawk #104 2006 GTO |
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#4
10-11-2020, 07:30 PM
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Replied.
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#5
10-11-2020, 07:50 PM
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__________________
So long, farewell. |
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#6
10-11-2020, 10:53 PM
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Got the info, thanks! Now another question. Are the vacuum lines attached to the right side valve cover with the nylon straps or do they just lay on that side?
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1970 Trans Am 1971 Trans Am 1974 Trans Am 1978 Y88 Trans Am W72/auto 1979 10th Anniversary Trans Am 1984 Trans Am 1993 Trans Am 1999 30th Anniversary Trans Am 2001 10th anniversary Firehawk #104 2006 GTO |
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#7
10-13-2020, 08:46 AM
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The vacuum bundle on my 74 Formula 400 4 speed was just laying on the manifold/valve cover with a semi-adhesive friction tape wrapped around it in a couple of spots. My engine is "restored" but that is how I found it.
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Scott 74 Firebird Formula 400 4speed 70 Buick GS455 4 speed |
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#8
10-14-2020, 07:27 PM
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Quote:
__________________
1970 Trans Am 1971 Trans Am 1974 Trans Am 1978 Y88 Trans Am W72/auto 1979 10th Anniversary Trans Am 1984 Trans Am 1993 Trans Am 1999 30th Anniversary Trans Am 2001 10th anniversary Firehawk #104 2006 GTO |
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#9
10-14-2020, 09:03 PM
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Send me a email I have picture a can’t attach here.
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#10
10-15-2020, 04:29 PM
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Quote:
__________________
1970 Trans Am 1971 Trans Am 1974 Trans Am 1978 Y88 Trans Am W72/auto 1979 10th Anniversary Trans Am 1984 Trans Am 1993 Trans Am 1999 30th Anniversary Trans Am 2001 10th anniversary Firehawk #104 2006 GTO |
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#11
10-15-2020, 05:14 PM
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Send me a privet message with you email so I can send you pictures of how it is attached.
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#12
10-17-2020, 01:26 AM
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Quote:
Sent you a PM a few days ago. Did you get this sorted? I have the 74 Emissions booklet on file. |
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#13
10-22-2020, 09:50 PM
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Alright, good chat.
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