C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

egr removal

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Old Apr 10, 2014 | 09:13 AM
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Default egr removal

I am about to start removing the EGR on my 92 and I'm not exactly sure what I'm supposed to do with This t port that goes into the side of the manifold on the driver side if someone could let me know if I'm just to block this off or leave it open or what it is even.http://i61.photobucket.com/albums/h6...ps1ergxoqp.jpg

Last edited by 92C4M6; Apr 10, 2014 at 09:18 AM.
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Old Apr 10, 2014 | 09:31 AM
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First, EGR only helps improve mileage and does not operate under load such as WOT. Therefore, no performance increase will be gained and only a loss of mileage will occur. Removal for headers would be understood. The vacuum hose runs to the EGR solenoid and may be blocked of and plugged.
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Old Apr 10, 2014 | 09:34 AM
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Headers going on this weekend. Just removing easy stuff now. So that t port that I'm removing will leave a nipple coming off the intake open, what is to be done with that nipple leave IT open or block it off somehow
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Old Apr 10, 2014 | 09:37 AM
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You may want to program out the EGR error code. It will set a light while driving when called for.
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Old Apr 10, 2014 | 09:46 AM
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Already have a pcmforless chip here ready with all that. Lol I just wanna know about this nipple in the intake that had that t port hooked to it haha?
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Old Apr 10, 2014 | 09:50 AM
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You can leave it, or remove it. If programmed correctly the ECM will not call for EGR, and the vacuum source will never be used by the solenoid.
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Old Apr 10, 2014 | 09:54 AM
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So leave it even though my chip I have to be installed is tuned for it not being there? I've removed the egr on 3 separate lt1 cars when I installed headers. Ive never had issues, not doubting you guys, just saying my history with it.
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Old Apr 10, 2014 | 09:55 AM
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Originally Posted by 92C4M6
Already have a pcmforless chip here ready with all that. Lol I just wanna know about this nipple in the intake that had that t port hooked to it haha?
If the PROM is EGR delete, you don't have to do ANYTHING. If there is a vac nipple OPEN, IIWM, I'd replace the line that goes there to keep it 'right' so you will know what it is and where it goes in the future. Another reason is to avoid potential vac leaks from deleted parts. If its left alone the chances of leaks are much less. Again,. 99% of ALL function and operation is a permission of/from the ECM. If the ECM does not tell the egr or anything else to work....it simply won't do anything.

The PROM will do everything in the ECM. Your 'smog stuff' stays in place to look good and give that "stock appearance"...

Last edited by leesvet; Apr 10, 2014 at 10:01 AM.
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Old Apr 10, 2014 | 10:02 AM
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The headers would have to be prepped for EGR to provide exhaust gases to the intake port. Without this just leave the EGR delete, and hope the programmer did it right. it takes more than just unchecking the diagnostics box. the EGR operation must be turned off.
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Old Apr 10, 2014 | 10:09 AM
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Well the programmer being pcmforless I think they probably will so it right.
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Old Apr 10, 2014 | 10:10 AM
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and hope the programmer did it right
It's Bryan Herter and this ain't his first rodeo.
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Old Apr 10, 2014 | 11:23 AM
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Can someone list all the parts that get removed from a 92 when removing egr...mainly curious about egr solenoid itself.
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Old Apr 10, 2014 | 12:23 PM
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Everything associated with it including the solenoid. My experience is with 1995's but I take off everything. Cleans up the engine real well. I just get blanking plates for the EGR and the feed tube, remove everything and plug all the vacuum holes. Bryan at PCMforless does the rest.
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Old Apr 11, 2014 | 12:46 PM
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Also what is the thing with the orange arrow. Red is the air pump I believe.
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Old Apr 11, 2014 | 05:49 PM
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Anyone?
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Old Apr 11, 2014 | 05:54 PM
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on my C4's I removed the pump and plugged the hoses, etc.. had no problems.
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Old Apr 11, 2014 | 06:33 PM
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So what's the orange arrow pointing too 383lpe?
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Old Apr 11, 2014 | 06:40 PM
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IIRC that has to do with holding a vacuum IE, for items in the interior that use it like the ac/heat supply, etc..
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Old Apr 11, 2014 | 07:06 PM
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Do I remove it or not when removing air/egr
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Old Apr 11, 2014 | 07:09 PM
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Originally Posted by 92C4M6
Do I remove it or not when removing air/egr
leave that intact for vacuum supply that is needed in multiple places
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