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Block off EGR on B230F?

which ezk number do you have? some (earlier ones) don't even check. should be a computer box with a number starting with 0 227 400 XXX, either on passenger footwell on 240 or side of steering column on 7/9.
 
Even if your state says you can, it's still federally illegal. You could just fab a piece of sheet metal to go in between the pipe and the intake manifold, and/or, swap the EZK to a non-EGR LH2.4 NA one. EGR lowers combustion temps, and can help with mpg's. On a red block it's super simple and is rarely an issue. I doubt you'll feel any performance difference.
 
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Yeah, assuming NA, find a 0 227 400 169 EZK box and that will surely not care about whatever you decide to do with EGR.
 
RenoHuskerDu said:
My state allows that we delete older vehicles. Would a simple block plate put my 1993 240 with LH 2.4 into fault state?
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Yes, blocking the flow will trigger a code. I doubt your state allows what you are saying they do. Not testing older vehicles does not equate to being able to legally remove their emissions equipment. Your state depends on Federal Highway dollars, thus, have to comply with Federal laws concerning vehicles. As said above, it's actually a Felony to disable emissions systems on vehicles that are operated on the road. It's that simple, no matter what state you live in.
 
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What's the purpose of blocking it off? It doesn't seem like this is a performance-related question.... the EGR is fulfilling a purpose that its designers intended.
 
EGR system's job is to lower combustion chamber temperature which in turn brings downs harmful NOx emission. It is only activated under light load, steady cruise- never under heavy throttle and high power demand. Disabling it will not make engine make more power. If the system is not functioning properly on the street car then it's best to fix it.
 
On gasoline engines EGR is also helping mileage. Reducing oxygen means that you have to pump more air and exhaust during the intake stroke. Pumping losses are less and compression works better. Also engine reaches operational temperature faster.

www.sae.org

Cooled EGR shows benefits for gasoline engines

Mahle Behr engineers believe using cooled EGR on gasoline engines has potential to improve fuel economy 2% to 5%.
www.sae.org
 
I read that EGR was only added because NOx climbed after they went to a mix leaner than Stoichiometric in search of lower HC. Lean burn caused NOx. A vicious cycle.

So logically a healthy motor running at Stoichiometric would not need EGR. A rich mixture has performance benefits. My uncle knows all this smog stuff history, he was there. I should ask him. I remember him telling me about air injection and the trouble it caused. Burnt exhaust ports and manifolds.
 
CarlosGato said:
I read that EGR was only added because NOx climbed after they went to a mix leaner than Stoichiometric in search of lower HC. Lean burn caused NOx. A vicious cycle.

So logically a healthy motor running at Stoichiometric would not need EGR. A rich mixture has performance benefits. My uncle knows all this smog stuff history, he was there. I should ask him. I remember him telling me about air injection and the trouble it caused. Burnt exhaust ports and manifolds.
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Almost all gasoline engines run most of their lives on lambda one.
 
2manyturbos said:
Yes, blocking the flow will trigger a code. I doubt your state allows what you are saying they do. Not testing older vehicles does not equate to being able to legally remove their emissions equipment. Your state depends on Federal Highway dollars, thus, have to comply with Federal laws concerning vehicles. As said above, it's actually a Felony to disable emissions systems on vehicles that are operated on the road. It's that simple, no matter what state you live in.
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