Author Topic: Emission controls question for you California folks  (Read 4195 times)

Offline zieg85

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Re: Emission controls question for you California folks
« Reply #15 on: February 23, 2015, 10:40:15 PM »
Obviously the air pump adds air to dilute the exhaust gasses correct?  Since I don't have a visual can I add air into the exhaust pipe and accomplish the same thing???  Any experts out there confirm this?
1985 C30 Custom Deluxe Ext. cab 5.7L TH400 3.21 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
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Online VileZambonie

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Re: Emission controls question for you California folks
« Reply #16 on: February 24, 2015, 09:02:40 AM »
No. A.I.R. Stands for Air Injection Reaction. The A.I.R. Pump supplies the air to the primary and secondary system. Think of it as post combustion combustion. If the spent gasses contain hydrocarbons and no oxygen it will not burn. Adding a small amount of oxygen into the exhaust manifold can help further burn off the HC's leaving the combustion chamber.

Did you fail emissions or are you trying to be proactive?

You can easily build a new set of pipes with copper or you can buy new manifolds or headers with A.I.R. setup.

If all you are getting is a visual verification of catalytic converter and exhaust integrity and the ASM test, why not just take it through?
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Online VileZambonie

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Re: Emission controls question for you California folks
« Reply #17 on: February 24, 2015, 09:19:53 AM »
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Offline zieg85

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Re: Emission controls question for you California folks
« Reply #19 on: February 24, 2015, 09:47:19 AM »


Did you fail emissions or are you trying to be proactive?



I was hoping for an excellent response, THANK YOU SO MUCH.  I passed emissions fine however the engine is on its last leg with oil consumption/loss/antifreeze in oil and a rod knock or rist pin/piston slap.  The existing A.I.R. tube will more than likely be destroyed upon removal.  I know of an engine out of a 1984 that I can buy to rebuild and have ready for the swap.  That is the preferred route but if I don't have a plan to meet the emissions challenge I may do a V-8 TBI swap instead.  I am just trying to gather all the missing pieces before I spend a dime.  Easiest for me is a direct swap for obvious reasons.  The carb on this 4.1L is set perfectly and is one of the few trucks I've had that start easily and you can take right off if you need to with no stalling issues.

Thanks again Vile
1985 C30 Custom Deluxe Ext. cab 5.7L TH400 3.21 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

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Re: Emission controls question for you California folks
« Reply #20 on: February 24, 2015, 10:19:56 AM »
If they only do the tailpipe test, gas cap and visual integrity of the exhaust with catalyst, I wouldn't even worry about it. Sounds like a good time to upgrade to V8 :)
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Offline NCali

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Re: Emission controls question for you California folks
« Reply #21 on: March 03, 2015, 10:00:26 PM »
out here in Cali, they have made the laws so strict that I once failed a smog test because I used a piece of heater hose, instead of a moulded  smog hose  from the air cleaner to the AIR pump.They have marked hoses now for calif emissions.
What that did was force reputable auto parts stores to carry more emission parts for older vehicles. I got mine from Napa but it took a few days to get it to this store
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Offline roundhouse

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Emission controls question for you California folks
« Reply #22 on: March 04, 2015, 07:07:27 AM »
A LS motor from a wrecked later model suburban is what you need
Right at $1000 where I live including computer and harness


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