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#1
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Photo's of a 77 W72 Vacuum Lines
Hey Guys, I am looking at photo's of original cars and the factory service manual and am seeing differences in the routing of some vacuum lines. Does anyone have a picture of where the two stock air clearer vacuum lines plug into.
Also, on the front of the carb, there is a check valve with vacuum line that I had plugged into the front of the quadrajet but the manual says, it should be to manifold vacuum. Thanks! |
#2
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On a '77 Z code 400 with auto and manual trans low altitude there are 4 vacuum lines that go to the air cleaner from the engine......
Two to the air cleaner TVS for the secondary vacuum break...red stripe from the "tree" on the back of the carb base to the inside port, white stripe from the secondary vacuum break to the outside port. One single hose from the intake manifold vacuum source directly under the air cleaner in front of and below the carb for the air temp sensor attached to the underside of the air cleaner. Part of the thermac system. The other vacuum line is a very weak vacuum signal for the thermostatic choke. From the choke stove pipe to the fresh air modulator mounted on the underside of the air cleaner. The EFE check valve gets it's vacuum signal from a manifold vacuum source on the front of the carb for both auto and manual trans. |
#3
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Quote:
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#4
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You're missing the rest of the hose from the fresh air modulator to the choke stove pipe.
Do you have the two port TVS? Its mounted in the side of the air cleaner. |
#5
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I do have that. I left it connected to the car.
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#6
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Here is my Can Am air cleaner from the W72 in it.
The sensor positioning is a little different in yours. Maybe it's an A body vs. F body thing, idk. |
The Following User Says Thank You to abefromen For This Useful Post: | ||
#7
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Allenga, I have my hoses still connected the factory way. I am having a kidney stone surgery tomorrow. I will be out of commission for a week or so. If you still have any need in this area, let me know...
Where do you stand on your paint job and engine mods?
__________________
1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... |
#8
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http://enthusiastnetwork.s3.amazonaw...ound%7C875:492
http://enthusiastnetwork.s3.amazonaw...ound%7C875:492 |
#9
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Quote:
Which is correct. |
#10
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Might be different versions, the diagram of the same car has it going to carb base.
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#11
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They just mean manifold vs. ported vacuum on the carb. (lower, on baseplate, is manifold). Here is a '76 diagram which should be close to the '77.
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So long, farewell. |
#12
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I have the colored vac line schematic also.
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🧩 Burds Parts, Finding those Hard to Find PCs, no Fisher Price Toys Here Just Say No To 8” Flakes F ire B irds 🇮🇱 |
#13
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__________________
1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... |
#14
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As above, it doesn't go to manifold itself, but a manifold port from carb, manifold vacuum vs ported vacuum.
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