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Egr help please

egr block off plate remove intake vacuum manifold

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#1 shadow89

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Posted 25 July 2015 - 11:09 AM

We just got a block off plate for our egr on a 1989 conquest. I cannot find where this goes into the manifold. It goes to the secondary air cleaner with the vacuum line coming off, but I dont see where it goes into the intake. There is a tube on the bottom of the secondary air cleaner that isnt connected to anything. Is that it? Not sure if its already been deleted and they just left of piping and aircleaner still in.

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#2 pcristquester

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Posted 25 July 2015 - 01:19 PM

Blocking the egr off won't help with performance, if that's your reason for doing so. Are you asking where the vacuum lines need to go if you delete the egr? There are some color coded vacuum diagrams on here somewhere. Sorry, but I'm not helpful with providing links on here.
The rubber tube coming off the secondary air cleaner goes to an aluminum pipe that wraps around the firewall side of the motor and into the stock pre-cat down pipe. It supplies secondary air into the exhaust. If you have an aftermarket down pipe, there is probably no bung for it to connect to. Unless you are trying to pass an emissions test, go ahead and get rid of what's left of the secondary air system and plug the vacuum lines associated with them
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#3 markhansenconquest

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Posted 25 July 2015 - 01:21 PM

no it supplys  fresh air to cat ,so cat can burn un burned fuel.........smog stuff for cleaner air............

#4 shadow89

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Posted 25 July 2015 - 01:29 PM

My understading is the EGR recirculated exhaust into the intake manifold to reduce nox. I dont see where the exhaust gas enters the intake manifold. ???

#5 pcristquester

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Posted 25 July 2015 - 01:55 PM

Between number 2 and 3 on the intake mani there are smaller runners that I assume are the egr pathways
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#6 shadow89

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Posted 25 July 2015 - 02:16 PM

But I do not see where the exhaust gas gets into the intake manifold. It just goes into the secondary air box. The only thing coming out of the secondary air box is the vacuum line. ???

#7 pcristquester

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Posted 25 July 2015 - 02:30 PM

Through the head into the intake manifold, not through the secondary air. The secondary air supplies air into the exhaust, it doesn't take from the exhaust into the secondary air
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#8 shadow89

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Posted 25 July 2015 - 02:52 PM

ok now that makes more sense thank you. I thought the tube going from the secondary air was the egr supply. Im just wanting to block off the exhaust gas from getting into the intake. is that possible even if its internal coming from the head?

#9 pcristquester

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Posted 25 July 2015 - 02:59 PM

Yes and no. Blocking it will just dead head it in the manifold, probably worse than letting it flow through as designed. Other guys (like most mods on here)can chime in and explain better than I can. I just know where the parts and pieces go and am mostly a stock setup kinda guy
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#10 shadow89

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Posted 25 July 2015 - 03:13 PM

hmmm interesting. ya doesnt seem worth it in the end then. Not even sure if putting the egr block plate is worth it. May just clean up the engine bay a bit :mellow:

#11 ucw458

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Posted 25 July 2015 - 03:13 PM

Removing EGR does nothing for performance.  It's only active while cruising.  EGR lowers emissions and raises mpg slightly.  Removing EGR will not make your car faster.  Remove it if you want but it's one of those misguided mods alot of car guys do thinking it's beneficial.  I added EGR to my MPI manifold.
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#12 importwarrior

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Posted 25 July 2015 - 07:41 PM

Did you check the FAQ?
Vac line diagrams show where it is.

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#13 TexasQuest

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Posted 25 July 2015 - 09:27 PM

Only reason for removing EGR or any emission component is for cleanliness and to tidy up the engine bay for a nicer look. Strictly for appearnce purpose only.
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View PostJohnnyWadd, on 04 March 2010 - 10:01 PM, said:

my shaft was big i dont know what your talking about.

#14 shadow89

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Posted 26 July 2015 - 12:30 AM

thanks all!





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