Alright...
Im looking to get a new turbo exhaust manifold- However, the one I'm looking at is not equipped with an EGR port, or channel- whatever.. I have a 97 2.4.
I do not want to get rid of my EGR valve because Ive read the nightmares about the EGR simulators and CEL's..
So, my question is- Can i just block off the EGR @ the exhaust manifold without a CEL?
If not, is there any other way to get around this? Maybe just drill a hole in the flange where the egr is, and let it suck outside air? Does any exhaust gases come out this EGR hole...?
Thanks for any input.
In case anyone is wondering what I'm talking about... That little piece of pipe on the flange.
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you can not block the exhaust passage without a cel. if you get a manifold and it does not have a notch in it then I would take a dremel and dremel out a notch to the exhaust port. look at the stock manifold and go off of that.
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Jcavi wrote:cant you use and 02 sim
egr and 02 are two different things.
one recirculates exhuast gas back into the intake, the other reads the amount of unburned oxygen in the exhaust.
-DS
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"I'm a product, of my environment
So don't blame me, I just work here
But I wanna f*** it up"
Offspring - americana
Alright...
Thanks for the info.
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You could do what I did. 99 pcm swap. Those didn't come with an EGR. I picked mine up for 65 bucks on car part. Good luck
z24 aint afraid of no ecotec
an egr valve recirculates exhaust gas back into the intake (Exhaust Gas Recirculation). it does this to prevent NOx (oxides of nitrogen) which appears when combustion temps get over 600 degrees, strictly emissions. but a side benefit of the egr valve is that it also helps prevent detonation. egr only occurs at certain times. i does not occur at WOT or at idle. therefore does not hurt your performance in any way.
all My research Ive never come across anyone dealing with an egr vavle. its not even in the boost faq. My boost manifold doesnt have one can I just let it go.
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Kick azz is my boost hero!!! 
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i hate the EGR.
i have a 96 ecu/ 2k motor but due do the egr in 96' i have to clear my check engine light each time i start it up. sucks, but with the egr sim' it ran like crap. Now it runs perfect.
so wait does this mean that I can just get a sim or is it really that important and if it is is it just a whole runing from the manifold to the intake and what sises. WTF HOW COME IVE NEVER HEARD OF PEOPKE DEALING
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Kick azz is my boost hero!!! "
Here my EGR blanked off. Leave it connected electrically coz you don't want a ECU warning light
Power Curve
And what's that do? It won't throw a code if you do that?
z24 aint afraid of no ecotec
Im pretty sure that in order to use the 99+ pcm you have to use the 99+ knock sensor in which you have to weld on a larger nut or something to be able to screw the knock sensor into.
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and that means you have to pull the motor mount off, timing chain cover, timing chain, intake cam, top of the intake cam carrier cover. which equals way to much work. so just keep it.
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I have a modified exploited manifold and I get the EGR code which I have to clear everynow and then. I have an EGR sim but I hear nothing but problems... so any other help / suggestions would be great... whats the deal with that pic above blocked off?
Well...
it looks like he blocked it off, but turned the EGR sideways so the plunger is still works.. ?
I don't know how "smart" the egr valve is- I mean, if it just opens and closes then it shouldn't throw a code- but if its actually sensing how much or the temperature of the air coming through...
I dont know...
Im going to build a quick blockoff plate like above, just to test it out.
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Quote:
it looks like he blocked it off, but turned the EGR sideways so the plunger is still works.. ?
Correct! The EGR valve operates as normal but it can no longer recycle exhaust gas.
The EGR valve is just a plunger operated by the ECU under certain conditions, my understanding anyway. I been running this set-up for a few months and not seen the ECU throw an EGR code.
Power Curve
^ what u did will throw a check engine light. Not right away but it will with in 200 miles.
trust me i been through this egr trickery b4, and to keep the car running normal and no check engine light randomly popping up, you have to clear the check engine light once it comes on when u first start it up and have just the egr plug hanging there nothing hooked to it.
If u leave the egr hooked up, it will pop a check engine light, then u try to clear it and it comes back a few miles later , u clear it again and it comes back.
you guys can go try that method, but u will get the "egr insufficent flow" code.
Well....
I made a small block off plate out of sheet metal-- took the egr from my spare motor and bolted that over the plate to seal it..
I left the factory EGR plugged in, but its just chillen there. There is no check engine light, but the Ive only driven it 10 miles or so.
One thing I noticed though, the cooling fan was coming on about 20 seconds after the car was started- even though it wasn't close or above operating temp.
So, I'm gonna try it out... See if I get a CEL- I dont mind the cooling fan on...
Worse comes to worse- I'll just get the exhaust manifold modified for the EGR.
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cooling fan on- soon to be check engine light.
fun isnt it
just dremmel out the turbo manifold for a egr port for less headaches.
I have well over 200 miles, probably about 2K with the EGR blocked and connected electrically on the side and have never had a CEL. My Opel Ecotec is probably running different ECU software as you folk in the States though.....
Power Curve
Jake the snake... My nukka..
Yeah- it threw a code after about 50 miles... oh well, the exhaust manifold will just have to be modified.
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I guess it doesnt matter to me if it throws the code as long as it doesnt affect anything else (like change fuel maps because of it or something like that). And looking at the diagram for installing the EGR sim, and looking at the PCM diagram, it looks like the EGR simulator maybe should be wired into the throttle position sensor instead of the map sensor?
http://esbob.com/docs/9624pcm.pdf
If you look at that diagram the EGR is tied into the TPS... maybe this is why no one had it work when hooked to MAP sensor? I don't know just a thought....
