cobray

Hi,
2002 Z28. I was looking for the EGR tube near my intake but I noticed there is no EGR..??! What looks like the EGR would go on my LS1 manifold there is no hole there (or EGR) like I see on other pictures.
I saw on both my manifolds I have tubes that come together towards the back of the motor that runs to my air pump in front of the drivers side tire then to my air box.

I understand certain new Corvettes do not come with an EGR because the efficency of the motor does not make enough emissions to warrant a EGR.

Am I correct? There is no EGR on 2002 Z28? I think I can just block off the holes in the manifold and in my air box and be done? I understand I may get an occasional code with AIR off.

Thanks in advance

<small>[ June 07, 2002, 07:27 PM: Message edited by: local13 ]</small>

unit213

I'm still somewhat of a newbie compared to all the geniuses on ls1tech, but I think I have your answer. The '01-'02 f-bodies have the ls6 intake manifold which doesn't require an EGR. I however have one since I have a '00 Z.
<img border="0" alt="[Camaro]" title="" src="graemlins/camaro.gif" />

cobray

That makes sense! Very cool. Thanks for the reply.

unit213

no problem. lord knows lots of people have helped me out!

cobray

Same car, 2002 Z28
Is it possible to remove the tube running from the air box to the air lid intake, and just let it hang? I would put a cap on the air hole on the box, of course. I wonder if that would throw a code? I could perhaps stuff some foam filter or soemthing in the hose for pressure?

I would think it would be a good thing to prevent the hot recirculated air from going back into my intake.

Also, could I not also put caps >over< the AIR system outputs on the exhaust manifold, to seal them, and leave all the AIR stuff on, to pass a visual emissions inspection?

Wow im learning alot from the board.

VIP1

2001 & 2002 Camaro and Firebird LS1 engines do have an LS6 intake, but that is not the only reason for the lack of EGR. From what I hear, the cam is the 6.0L truck cam which has increased overlap negating the need for an EGR system.

By my understanding, the AIR system (Air Injection Reaction?) "injects" air into the exhaust stream to improve the effeciency of the catalytic converters. If you disconnect the AIR hose from the air box, I suggest you cap it with a filter. A valve cover breather/filter or the one you see in the import isle at Pep Boys would work (looks like a valve cover breather and comes in chrome, blue, black, red).

--VIP1

<small>[ June 07, 2002, 10:59 PM: Message edited by: VIP1 ]</small>

Red2000SS

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by local13:
<strong>Same car, 2002 Z28
Is it possible to remove the tube running from the air box to the air lid intake, and just let it hang? I would put a cap on the air hole on the box, of course. I wonder if that would throw a code? I could perhaps stuff some foam filter or soemthing in the hose for pressure?.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yes this is possible, but if you're going to leave your AIR system hooked up, I would put a filter on the end of the hose. Better yet throw your stock air lid in the trash and buy any of the aftermarket lids - most will come with a filter for your AIR system. You will not throw a code from doing this.

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">
I would think it would be a good thing to prevent the hot recirculated air from going back into my intake. </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">There is no hot recirculated air going in your intake from this hose. I think maybe you're confusing this with the EGR system (which you don't have if you have a 2001 or later car). The hose you are talking about feeds filtered air to the air pump which pumps fresh air into your exhaust to help the catylitic converters heat up quicker on startup. The air pump ususally only runs for a short time after startup.

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">
Also, could I not also put caps >over< the AIR system outputs on the exhaust manifold, to seal them, and leave all the AIR stuff on, to pass a visual emissions inspection?</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">You could pass visual inspection, but you will very likely throw a code. The computer periodically tests that the air pump is working properly by turning it on and then observing the O2 sensor readings. If the air tubes are blocked off, the computer will be able to tell and throw a code.

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"><strong>
Wow im learning alot from the board.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Keep on reading, you can learn a lot from this board.

Good luck.

mykdiver

NO

bob1esq

your air pump does not push any air into your air lid, it vacuums is out and pushes it into your exhaust stream. Hmm, I just got an idea. If I were to re-route my hoses so that air was vacuumed out of the crankcase (through the oil cap) then I would have a vacuum pump which would increase my horsepower. I wonder why gm did not do this, probably because the air in the crankcase was dirty and would interfere with proper cat and o2 operation. My cats are hollowed out so I am not worried about damaging them--but then again, I use my car on the track only, and I have already plugged my exhaust air inlets off. I am gong to try it!

Doore39

iTrader: (5)

What he said.

presto_z

iTrader: (12)

i just plugged mine off when i deleted my air system.... an air hose quick connect fits perfect for a temp. plug....ha

Shallow Bay

iTrader: (3)

The last 3 replies in this thread seriously crack me up. Am I the only one who realizes this thread is over 4 years old!!!

Tainted

iTrader: (9)

01-02 cars have no egr, all years have an AIR system though

Snuffles

iTrader: (1)

I realized it when I saw Unit said he was a newb. He has 11,000+ posts now.

And what's funnier is that Tainted posted a reply to the original poster after you posted.

KameleonTransAm

iTrader: (1)

Wow this is crazy Unit as a newb. Now I've seen everything