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#1 |
Registered User
Join Date: Dec 2009
Location: bisbee, arizona
Posts: 1,529
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pollution controls, how to run the hoses
I got a 72 307 half ton with 3 speed. Alot of whats under the hood is origional. I want to keep it that way. What about polution controls. Mine is not an CA truck. I got a switch on the tranny sid cover that I thought was for back up lites...wrong Huh? and the electrically operated air valve thingie that goes between the vac advance and the carb and som evap canister. Its all there but whats it do, how do you test it for correct opps and how do you route the hoses correctly and if need be where are new NOS parts available.
Expound please. |
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#2 |
member #16
![]() Join Date: Dec 1999
Location: Yuba City Ca.
Posts: 3,618
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Re: pollution controls, how to run the hoses
Sounds lile you have TCS (transmission controlled spark) on your truck. The solenoid between the carb and vac advance allows advance only when in high gear. The trans switch controls it. It should also have a temp sender in the pass side head so it works only when up to oper. temp. Maybe someone has a vacuum diagram they can post.
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john http://67-72chevytrucks.com/vboard/showgroups.php board vendors ![]() http://www.flickr.com/photos/1745471...7602865984234/ |
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#3 |
Registered User
Join Date: Dec 2009
Location: bisbee, arizona
Posts: 1,529
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Re: pollution controls, how to run the hoses
My truck is not a ca truck, it would NOT have had the AIR system as well would it. It does not seem to have.
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#4 |
Registered User
Join Date: Jun 2000
Location: Bismarck, ND
Posts: 4,285
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Re: pollution controls, how to run the hoses
From what I've seen, non calf trucks with manual transmission trucks had AIR systems from 68 up. I'm not sure which year they went away from AIR though. My Non calf 68 still has AIR. I don't have anything on my tranny related to smog control though.
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Unrestored 68 C-10 CST. Original 327. 4-Speed CH465. 50k or so miles. TREASURER, Drum Brake Club. |
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#5 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: pollution controls, how to run the hoses
excellent diagrams of the charcoal recovery cannister routing are in the factory assembley manual most vendors can supply it for you at a reasonable price
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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#6 |
Registered User
Join Date: Dec 2009
Location: bisbee, arizona
Posts: 1,529
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Re: pollution controls, how to run the hoses
I'm fairly sure my truck did not have the AIR system on it. I got that factory assembly manual. but my truck is a 72 and there not alot on 72's in there or info on pulleys and brackets.
who has a parts manual for this 72 year truck? on Disk? |
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