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Vacuum line diagram needed?

Tiny
RITZO
  • MEMBER
  • 1972 CHEVROLET NOVA
  • 0.5L
  • V8
  • 2WD
  • MANUAL
  • 22,000 MILES
Need a vacuum line diagram specific to the 350 quadrajet 4 barrel. The car listed above is an SS. It has all factory material 22,000 miles. Also has an electrical solenoid with a vacuum hose.
Friday, September 8th, 2023 AT 10:34 AM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

Because of the model year, I basically have little to nothing. I attached what I was able to find for the air injection and the deceleration valve. I know there has to be one for the vacuum advance. Usually, that is a ported vacuum and comes from the carb.

Take a look at what I attached. Let me know if you have any specific questions, I'll try my best to help.

Take care,

Joe

See pics below.
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Friday, September 8th, 2023 AT 7:35 PM
Tiny
RITZO
  • MEMBER
  • 3 POSTS
I believe what you are showing is from a 73 that we used to call a smog pump. I do not have that.
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Saturday, September 9th, 2023 AT 3:43 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

Wow, that looks great! Most hoses looked connected. Are there certain ones you are having an issue with?

Also, the pics I sent indicated 1972, so I'm not sure. See pic 1 below.

I was able to find two more schematics in a different manual. One is for the vacuum advance and the other is for the EGR. (See pics 2 and 3)

Let me know if they help at all.

Take care,

joe

See pics below.
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Saturday, September 9th, 2023 AT 8:24 PM
Tiny
RITZO
  • MEMBER
  • 3 POSTS
I went to jegs yesterday a purchased 3 manuals for the Nova. Some help but not a 100% so I will figure it out or attend some car shows that have the same setup.
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Sunday, September 10th, 2023 AT 6:20 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

Sorry I couldn't get more for you. I hope you are able to find what is needed. The car show idea is actually a good one.

If there is anything other, I can help with, let me know.

Take care,

Joe
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Sunday, September 10th, 2023 AT 7:16 PM

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