LT1-LT4 Modifications 1993-97 Gen II Small Block V8

A.I.R. delete/removal???

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Old Feb 6, 2008 | 12:09 AM
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Default A.I.R. delete/removal???

Hey fellas, I just installed a set of MAC mid lenth headers on the LT1 this weekend (PITA)... I got to looking at the overall appearance under the hood. I see that I have a lot of potential cleaning up what I already have and making it look really nice. One thing that I'm wondering is, can I remove the A.I.R. check valves and tubing and weld up/cap off the header inserts? This would make a better appearance especially on the passenger side. I had a custom 2 1/2 in y-pipe made and threw the cat in the dumpster! I'm under the impression that there is really no need for that a i r system now.?.?. Any ideas? Thanks

late 95 Trans am LT1...
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Old Feb 6, 2008 | 12:16 AM
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You are correct, the only function of the air system is to heat up the exhaust for the cat.
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Old Feb 6, 2008 | 02:11 AM
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Isn't the AIR pump for the EGR and nothing to do with the cat except indirectly?
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Old Feb 6, 2008 | 02:45 AM
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Originally Posted by Formula350
Isn't the AIR pump for the EGR and nothing to do with the cat except indirectly?
no. AIR has nothing to do with EGR. Its only purpose is to heat up the exhaust like I said.
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Old Feb 6, 2008 | 04:40 AM
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will it set off an ses like it does the newer ones?
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Old Feb 6, 2008 | 04:53 AM
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Yup. Good thing that it's a relatively easy system to diagnose and fix...
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Old Feb 6, 2008 | 04:59 AM
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Originally Posted by t-rocks firehawk
will it set off an ses like it does the newer ones?
Yes, removing the AIR or EGR usually sets a code off. It can be removed with a tune.
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Old Feb 6, 2008 | 10:53 AM
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Default air

Thanks for the advice. I could easily cap off the insert on the headers, leave the a i r tubing open (because it just blows air) and leave the pump installed for now. To me, that shouldn't set a code due to the fact that the system is still functioning but just not the way it was ment to... right???
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Old Feb 6, 2008 | 11:04 AM
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I know on the OBD 1 cars, you just make sure the fuse is good and you pull the pigtail out of the air pump. Then there is no SES light. I didn't have an AIR pump for a while so this is what I did.
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Old Feb 6, 2008 | 12:50 PM
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ya cap the headers and remove the A.I.R. system.
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Old Feb 6, 2008 | 01:55 PM
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Originally Posted by throttlejunkie1
Thanks for the advice. I could easily cap off the insert on the headers, leave the a i r tubing open (because it just blows air) and leave the pump installed for now. To me, that shouldn't set a code due to the fact that the system is still functioning but just not the way it was ment to... right???
right
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Old Feb 6, 2008 | 03:13 PM
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Well my AIR plumbed into the back of the intake next to the EGR *shrug*
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Old Feb 6, 2008 | 04:28 PM
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You can get block off plates for the back of the intake for the egr and air system.
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Old Feb 6, 2008 | 06:40 PM
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unhook the air tubing from the headers, and connect it to your intake - free supercharger






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Old Feb 6, 2008 | 08:24 PM
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Default seriously....

I don't know about all that... I'm kinda gulable but if it were plausable, I think everybody would be doing it. Besides, the a i r pump only operates at idle/low idle I think.




Originally Posted by StolenRedCamaro
unhook the air tubing from the headers, and connect it to your intake - free supercharger






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Old Feb 6, 2008 | 10:14 PM
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yup, it's only on at idle
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Old Feb 6, 2008 | 10:41 PM
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Originally Posted by Formula350
Well my AIR plumbed into the back of the intake next to the EGR *shrug*
I just pulled that bitch off of mine. That thing was amazingly difficult to get to.

Originally Posted by sweet-94z28
I know on the OBD 1 cars, you just make sure the fuse is good and you pull the pigtail out of the air pump. Then there is no SES light. I didn't have an AIR pump for a while so this is what I did.
Will that work with the 93 ECM?
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Old Feb 6, 2008 | 11:09 PM
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Default done

Well, heres what I ended up with. I welded a two way bolt. Then I self screwed the a i r check valve into one of the ends and welded it too (after I removed it from that long *** piping). Screwed it into the header, cut the hose to length, and plugged it back in. I probly need to post a picture for a better visual.

Over all outcome, the a i r system (technically not used) but still in tact and appears much neater within the engine bay, instead of wrapping all the way down the valve cover and back. Plus, I have so much more access to get in there and torque check my header bolts on occasion.

Let me know if you guys would like a picture of how it ended up.

Last edited by throttlejunkie1; Feb 6, 2008 at 11:10 PM. Reason: miss spell
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Old Feb 6, 2008 | 11:36 PM
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Sounds like it worked. That should work on the 93 ECM. All it does is check the circuit.
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Old Feb 6, 2008 | 11:46 PM
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Originally Posted by sweet-94z28
Sounds like it worked. That should work on the 93 ECM. All it does is check the circuit.
I'm guessing by the way it works I can't cut those wires without throwing the code then?
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