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 Post subject: blocking off EGR why + Pros & Cons
PostPosted: Wed Jan 24, 2007 8:25 pm 
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Neon Enthusiast

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Location: Cody, Wy
I have heard of people removing there egr and i have to wonder why, what does it do

also how bout a guide to do it or some instructions anyway

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 Post subject:
PostPosted: Wed Jan 24, 2007 8:35 pm 
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I lsit pros n cons on my website:

Follow link in my sig.

V

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 Post subject:
PostPosted: Wed Jan 24, 2007 8:55 pm 
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Neon Enthusiast

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Location: Cody, Wy
i looked over your site and could not find any pros and cons
i did find the block off kit and the instructions though

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 Post subject:
PostPosted: Wed Jan 24, 2007 8:58 pm 
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Con is mostly that engine CEL will turn on and in many states that's reason for not passing inspection.

V

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 Post subject:
PostPosted: Wed Jan 24, 2007 9:02 pm 
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Neon Enthusiast

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Location: Cody, Wy
ok no inspection at all in wyoming

But other wise this is a good mod?

Is there much of a power gain from just this? / with some basic mods?

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 Post subject:
PostPosted: Wed Jan 24, 2007 9:05 pm 
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Neon Enthusiast
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the pro is clean intake and TB and clean cylinders

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 Post subject:
PostPosted: Wed Jan 24, 2007 9:36 pm 
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Another con is that your car produces more pollution. FWIW, here's what Wikipedia says:
http://en.wikipedia.org/wiki/Exhaust_gas_recirculation

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 Post subject:
PostPosted: Wed Jan 24, 2007 9:57 pm 
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Prove it!

I ran my neon through NJ/CA style emissions tester and found there was veryyy negligible differences between stock and no-egr system. A proper working cat makes 1000's of % more egr system.

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 Post subject:
PostPosted: Wed Jan 24, 2007 10:06 pm 
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It would defy logic for the car companies to make the EGR if it didn't do anything.

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 Post subject:
PostPosted: Wed Jan 24, 2007 10:33 pm 
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Vitor wrote:
Prove it!

I ran my neon through NJ/CA style emissions tester and found there was veryyy negligible differences between stock and no-egr system. A proper working cat makes 1000's of % more egr system.



EGR does not open during an emissions test. Only on decel which even on a smog dyno will likely not open because most smog techs drop RPM's very slowly so they dont get a spike in emissions. It does increase emissions but it really is very little considering how much the valve is actually open.

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 Post subject:
PostPosted: Wed Jan 24, 2007 10:48 pm 
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winsettz wrote:
It would defy logic for the car companies to make the EGR if it didn't do anything.

IIRC, i've seen a chrysler 2.7L with an egr valve that didn't do a thing. it was "factory" blocked, no provision for the exhaust to feed the egr valve. it had the whole egr system though

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 Post subject:
PostPosted: Wed Jan 24, 2007 10:49 pm 
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winsettz wrote:
It would defy logic for the car companies to make the EGR if it didn't do anything.


And they are not on every car either and for that not every neon has em either.
Lorenzo

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 Post subject:
PostPosted: Thu Jan 25, 2007 8:19 am 
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Neon Enthusiast

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winsettz wrote:
It would defy logic for the car companies to make the EGR if it didn't do anything.


That's why my 01 doesn't have it :?:

Removed the EGR on my 95 also, it passes emissions test every year without problem.


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 Post subject:
PostPosted: Thu Jan 25, 2007 10:34 am 
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Neon Enthusiast

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the egr system it designed to reduce combustion chamber temps to prevent the production of NOx emissions. NOx destroys ozone and the EGR stops this by putting dead air *read air that can't be a part of combustion again* into the combustion chambers, reducing the fire inside of them. They also help with fuel economy because with the "stale" air going in, the ammount of fuel has to be reduced or the car will go very rich burn

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 Post subject:
PostPosted: Thu Jan 25, 2007 12:38 pm 
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Neon Enthusiast

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It reduces heat in cylinders which, back in the day, would help prevent knock.

Newer vehicles use valve overlap to "recirculate" exhaust gases back into the intake air.

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 Post subject:
PostPosted: Thu Jan 25, 2007 6:09 pm 
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Removing EGR gets absolutely no performance what-so-ever. The EGR closes when you go WOT anyway, so how does blocking it change anything.

I've seen several posts that people that have blocked the EGR get less gas mileage. That makes sense, since the condition the EGR would be used most is at or near cruise. The EGR dilutes extra oxygen, if its not there, then extra oxygen would be detected by the O2 sensor and the feedback would make the PCM go richer.

I've kept my EGR working and a little soot on the inside of the intake (and exactly how does that effect anything) comes off very easily when I clean the TB and Combustion Chamber once a year.

True, blocking the EGR on the Neon really doesn't effect the motor that negatively, besides mileage, BUT it also doesn't get you anything at all. Thats not true for other cars, some the EGR is used enough that the motor is tuned for it, and blocking changes the tune of the motor enough to hurt performance or cause spark knock, etc.

I've seen posts from people that failed and passed emissions tests with a blocked EGR. I guess it depends on the emissions test done, as well as the condition of the Catalytic Converter that can convert the additional NOx from a block EGR. I "suspect" the extra NOx from a blocked EGR could run the CAT hotter and even burn it up, I don't know that, I'm just guessing.

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 Post subject:
PostPosted: Thu Jan 25, 2007 6:35 pm 
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Neon Enthusiast
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you're all wrong, that tube you're blocking off goes to the flux capacitor :lol:

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 Post subject:
PostPosted: Thu Jan 25, 2007 6:38 pm 
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Quote:
you're all wrong, that tube you're blocking off goes to the flux capacitor


OK now that's funny

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 Post subject:
PostPosted: Thu Jan 25, 2007 6:53 pm 
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when i removed my EGR the MPG went through the floor, i put it back on a few weeks later.

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 Post subject:
PostPosted: Thu Jan 25, 2007 6:57 pm 
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hell, its another thing to add to your mod list, and you could also tell the ricer kids it adds 15hp and it helps you pick up chicks.

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 Post subject:
PostPosted: Fri Jan 26, 2007 2:45 am 
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New

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Location: salinas
EGR=poor man's water injection system

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 Post subject:
PostPosted: Fri Jan 26, 2007 4:31 am 
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notonto wrote:
EGR=poor man's water injection system


you gotta love newbies and their wacky ideas, i get what he is trying to say, but im gonna stick with my flux capacitor theory, without it you can't engage the hyper-drive or the turbo encabulator :lol:

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 Post subject:
PostPosted: Fri Jan 26, 2007 4:53 am 
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Neon Enthusiast
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when i installed mine, my throttle response made a noticeable gain

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 Post subject:
PostPosted: Fri Jan 26, 2007 8:49 am 
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I don't know about everyone else, but for me it was worth it to block it off. I noticed better increase in throttle response and in gas mileage.
No more gunky TB and intake. used 2 cans of TB cleaner to clean everything up

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 Post subject:
PostPosted: Fri Jan 26, 2007 9:21 am 
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Neon Enthusiast

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weird, i've put the mopar pcm on mine over the past summer, taken the egr valve off. i know the mopar pcm does not recognize the egr valve(thus no check engine light); but does the egr valve still function as normal? mileage was good, well not bad for atx, for a while also(now on winter gas :evil: )

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 Post subject:
PostPosted: Fri Jan 26, 2007 10:02 am 
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Neon Enthusiast

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I think the Mopar PCM just won't trigger the CEL for the removal of a EGR, but otherwise will still regulate it properly.

Question: For the people who pass emissions w/o EGR, is that by Cali stds? I dont think the emissions tests are standardized at the federal level, so the states are basically deciding how much tailpipe emissions they want (and since we have too many cars, ours must be clean.)

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 Post subject:
PostPosted: Fri Jan 26, 2007 11:39 am 
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If you remove it, you will have one less thing that can fail and make your car run poorly. Mine is unhooked and I still get 39 MPG on the highway.


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 Post subject:
PostPosted: Fri Jan 26, 2007 1:13 pm 
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Neon Enthusiast

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Blue wrote:
If you remove it, you will have one less thing that can fail and make your car run poorly. Mine is unhooked and I still get 39 MPG on the highway.


Same here, mine is removed and blocked and I still get the same mileage as before I blocked it, 35-38 mpg.

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 Post subject:
PostPosted: Sun Mar 30, 2008 5:50 pm 
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Mine is hooked up and I get 45 mpg highway :P


Anyway, I brought this thread back alive because I was wondering if the AFX pcms still operate the EGR like the mopar does.....?

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