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08-09-2009, 05:17 PM
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#1 |
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Registered User
Join Date: Apr 2002
Location: Manitoba, Canada
Posts: 663
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AIR Injection System
My '69 has the AIR injection system for pollution control. It has a special exhaust manifold that allows air to be pumped in to complete the burn. Can this be easily removed? How do you plug the holes in the exhaust manifold?
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Present: 2015 Tacoma. Yeah, not a GM, but I love it. 1969 GMC 32,000 - fix, drive, relax, fix... 2019 BMW R1250 GSA - Yahoooooooo 1979 Honda GL 1000 - retro touring at its best. Past: '05 Sierra 4x4 - Had 270,000 KM and running well when it was written-off by a stop sign runner. '94 F-150 from the "F word" company. I'll admit it...good truck. Sold what was left of it for $800 to a guy who came to pick it up at 11:00 PM with cash in hand. Hmm. '79 Sierra Grande (Black) organ donor - perfect rebuildable 4-bolt 350 and a good TH350. '76 Sierra Grande (Orange) - hate isn't too strong a word. Kid who bought it turned it into a hot rod. '68 C-10 R.I.P. - Dad's old truck...too far gone to resurrect. '59 C-50 - with hoist. Truck is gone, wife isn't. Nuff said. |
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08-09-2009, 05:48 PM
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#2 |
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Registered User
Join Date: Feb 2002
Location: Vacaville, CA
Posts: 2,746
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Re: AIR Injection System
Remove the pump and tubes and put pipe plugs in the manifold holes.
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 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI |
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08-09-2009, 05:54 PM
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#3 |
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Registered User
Join Date: Jan 2007
Location: Opdyke, IL
Posts: 775
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Re: AIR Injection System
I took mine off of my 84 dodge. I'm assuming that they are pretty well the same thing. I took off the pump and plugged the hoses. When i get the chance i'm going to take the hoses and tubes off and block them off. I had a real bad popping from the exhaust on deceleration with the pump on. Took it off and the pop is gone. Didnt hurt or help the way the engine runs.
I'm not familiar with what they're like on the chevy's but mine has rubber hoses that go to metal tubes and the tubes go to the manifolds. I plugged the rubber hoses for now. If yours has those you can do that or I'm guessing that you could crimp and fold the metal tubes to block them off.
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1978 Chevrolet Silverado 3/4 ton 400 small block. 2000 F-250 Powerstroke 2002 GMC Yukon Denali XL |
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08-09-2009, 08:02 PM
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#4 |
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Registered User
Join Date: Nov 2008
Location: San Jose Ca
Posts: 265
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Re: AIR Injection System
you will need to get 1/4 pipe plugs. I got the brass ones at the local HW store.
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08-10-2009, 07:07 PM
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#5 |
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Registered User
Join Date: Jan 2006
Location: Take Off
Posts: 1,908
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Re: AIR Injection System
I bought plugs from Ebay that use an allen wrench/socket to install them and sit flush. Look a lot cleaner than pipe plugs. Camaro Restoration places also sell the proper oem plugs with a hex head on them.
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08-10-2009, 08:53 PM
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#6 |
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Nothing to see here.....
 
Join Date: Jun 2007
Location: Shawnee, KS
Posts: 4,625
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Re: AIR Injection System
just curious, was your truck built in Fremont, CA??
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Doug  THANK YOU to our American Soldiers & Veterans - POW MIA "You will NEVER be forgotten". The democracy will cease to exist when you take away from those who are willing to work and give to those who would not. Thomas Jefferson |
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08-10-2009, 09:31 PM
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#7 |
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Registered User
Join Date: Jan 2008
Location: Tejas
Posts: 691
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Re: AIR Injection System
My truck was a cali built cali emissions truck in which the air cleaner flap, air injection, and egr all died within weeks of each other. I just used bolts for the air injection ports and it looks like crap. I didn't care because headers are coming soon.
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'72 cheyenne super step, '05 long bed gmc |
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