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#1
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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 |
#2
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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 |
#3
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Sent!
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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 |
#4
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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 |
#5
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So long, farewell. |
#6
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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 |
#7
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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 |
#8
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I have seen other pics like that. Valve cover has the little brackets for the straps to clip into and the GM diagram shows the straps being used. That is how I did mine.
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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 |
#9
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Send me a email I have picture a can’t attach here.
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#10
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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 |
#11
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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
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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. |
#13
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Alright, good chat.
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