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Old 07-26-2015, 05:14 PM   #1
mikagraham
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84 chevy c10 305 vacuum help

I have read other msgs on here and try to view the photos but it isnt working. I have 84 chevy c10 305 with Rochester quad carb. There r 2 vacuum lines coming off the back i cant figure out. Can anyone help? Can someone add photos of thier truck and vacuum lines. Thanks.
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Old 07-27-2015, 11:25 PM   #2
mikagraham
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Anyone?
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Old 07-28-2015, 06:23 PM   #3
beamn7
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Re: 84 chevy c10 305 vacuum help

Federal emissions or CA emissions?
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Old 07-28-2015, 06:30 PM   #4
mikagraham
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Quote:
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Federal emissions or CA emissions?
How do i know?
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Old 07-29-2015, 11:50 PM   #5
PAWS 72
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Re: 84 chevy c10 305 vacuum help

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Federal emissions or CA emissions?
Probably Federal. Not Cali. Seeing he's is Missouri
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Old 07-31-2015, 09:46 AM   #6
mikagraham
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Thats wat i was thinking. Still need sum help. Thanks
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Old 07-31-2015, 12:06 PM   #7
geezer#99
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Re: 84 chevy c10 305 vacuum help

Quote:
Originally Posted by mikagraham View Post
I have read other msgs on here and try to view the photos but it isnt working. I have 84 chevy c10 305 with Rochester quad carb. There r 2 vacuum lines coming off the back i cant figure out. Can anyone help? Can someone add photos of thier truck and vacuum lines. Thanks.
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Post a pic of what you got!
Easier for us to help fix your problem if we can see it!
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Old 08-01-2015, 06:10 AM   #8
chengny
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Re: 84 chevy c10 305 vacuum help

Below is the vacuum diagram for a truck with an XSS EPA code. I knew the engine size and year, but without any more info I had to guess on some stuff. In addition to 305/1984, I used automatic transmission, federal & low altitude. "Federal low altitude" just means not California and not high altitude (essentially the standard emissions package). But it really doesn't matter as far as this particular issue is concerned - the vacuum diagram for every 1984 with a 305 and AT had only one hose connected to the back of the carburetor. And in every case that hose went to the EGR bleed solenoid. The other hose is probably the vacuum supply to the power brake booster.

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