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OH NO, NO EGR!!
Posted: April 13th, 2005, 11:46 am
by jschrauwen
Continuing to rectify my apparent rich mixture so as to pass E-Test. I've discovered on the EGR Control Valve that the 2 major ports (same size I think) where one runs from the header/exhaust manifold and the other to the IM plennum (vaccum I'm assuming), well these 2 lines feed back into each other. In other words, those 2 lines run back into each other and are not connected to either the IM or the exhaust header. Additionally, the smaller (vaccum I'm assuming) line that runs from the EGR Control Valve to the Solenoid Valve(EGR,Vent) was not connected, and just laying loose.
Is the EGR system necessary/critical for a cleaner, smoother running engine? Will it improve my chances at passing an E-Test? I'm assuming that there may be no port available on the exhaust header to tap into and that's why it's not hooked up. This system also incorporates the vaccum for the PRC Solenoid Valve which regulates warm re-starts.
Any suggestions from those intuned to this dilema.
Posted: April 13th, 2005, 12:04 pm
by Nd4SpdSe
You will encounter 2 problems, not only does the engine not have an EGR tap, but a KL31/36 ECU doesn't support the EGR either.
I don't have mine hooked up, but passes emmissions no problem (thanks to Mr. Coleman
)
Posted: April 13th, 2005, 12:21 pm
by jschrauwen
Nd4SpdSe wrote:You will encounter 2 problems, not only does the engine not have an EGR tap, but a KL31/36 ECU doesn't support the EGR either.
I don't have mine hooked up, but passes emmissions no problem (thanks to Mr. Coleman
)
I'm not sure what you mean by the engine does not have an EGR tap. Looking at various schematics, it appears that the EGR Control Valve has a feed off the exhaust manifold/header. Is this not correct?
KL31/36 does not support it? You mean to say that the ZE engine utilized in the J-Spec MX6 does not incorporate an EGR system? I thought that all Mazda produced vehicles no matter the intended market would incorporate an EGR system. I thought it was all part of an anti-pollution system that all major manufacturers must abide by. I find it hard to believe that J-Spec vehicles would bypass/omit this type of pollution device.
Good to know that you passed!! Thanks for all of that Mike. I wonder if someone could clarify some of these anomalies.
Posted: April 13th, 2005, 12:42 pm
by Nd4SpdSe
Description: The Exhaust Gas Recirculation (EGR) valve and its related components first appeared on automobiles in 1972. The valve may be controlled by vacuum or electronically depending on the year, make and manufacturer of the vehicle. The use of EGR is on the decline since manufacturers began to use fuel injection, which provides more accurate control over the fuel and air mixture.
Purpose: EGR systems help reduce the level of harmful oxides of nitrogen emissions (NOx) in the exhaust. This type of emission increases with combustion temperature. Although at first impression it may appear counter-productive, the EGR system does this by introducing calibrated amounts of exhaust gas into the engine’s intake system. Since the exhaust gas—for the most part—doesn’t burn, it takes up some of the space in the combustion chamber of the air/fuel mixture. As a result, combustion chamber temperature drops and so do NOx emissions.
My engine does not have the holes required to connect any of the EGR system.
I don't know if they do today or not, but Japan did not require EGR systems
Posted: April 13th, 2005, 2:05 pm
by babyblueMX3
yup agreed...on the intake..their's a block off plate instead of the egr valve..
if you don't have the egr valve and need one I got one
Posted: April 13th, 2005, 2:14 pm
by Nd4SpdSe
Still not good do him any good without a supporting ECU, no?
Posted: April 13th, 2005, 3:18 pm
by babyblueMX3
he just have to use his stock ecu
Posted: April 13th, 2005, 7:09 pm
by jschrauwen
babyblueMX3 wrote:he just have to use his stock ecu
KL31 should be here in a couple of days. Are you saying that it should improve things by providing a better air/fuel mixture? So much so that I'll be able to achieve a "normal", even, steady idle? If this be the case, and that the J-Spec Mazda's do not have an EGR system, then theoretically, I should be able to remove the EGR Control Valve and the 2 EGR Solenoid Valves and suffer no ill effect to performance or E-Testing, correct?
Mike, What TB are you using and did you remove all of your EGR stuff?
Posted: April 13th, 2005, 7:23 pm
by babyblueMX3
I was just saying to use your stock ecu so it can control the egr valve. that's it
Posted: April 13th, 2005, 7:29 pm
by jschrauwen
babyblueMX3 wrote:I was just saying to use your stock ecu so it can control the egr valve. that's it
OK, got you Blue. Thanks What's your take on the necessity or not, to retain the EGR system once the KL31 and JE50 VAF are in?
Posted: April 13th, 2005, 9:41 pm
by babyblueMX3
nope once your ecu will be in the egr will be useless anyways.. so just leave it unplug and plug the underside of the egr valve so their's no leak. Make sure the the hole on the rear manifold is blocked too if you ain't using the egr.
so 1.8ecu + egr for emissions test.
then kl31 + egr remove/block afterward
Posted: April 14th, 2005, 8:50 pm
by 4u2nv
babyblueMX3 wrote:nope once your ecu will be in the egr will be useless anyways.. so just leave it unplug and plug the underside of the egr valve so their's no leak. Make sure the the hole on the rear manifold is blocked too if you ain't using the egr.
so 1.8ecu + egr for emissions test.
then kl31 + egr remove/block afterward
dont have my ze manifold pluged and it doesn't leak ... I think when you screw in the egr pipe it opens the port // if there is no pipe no leak... I've reved up the engine with my finger on the hole and there is no suction.
Posted: April 14th, 2005, 9:28 pm
by jschrauwen
Wait a minute. Why would there be an EGR Control Valve on my ZE unless the installer took the one from the K8 and put it on? This very strange. Since a-spec is very knowledgeable about MX3's and RX7's and Prot's, then they should also know that an EGR system would not integrate into a ZE. This is very strange and a call to a-spec I believe is in order, unless someone can clarify. As it stands now from previous posts this EGR Control Valve should never have come with the ZE.
Posted: April 14th, 2005, 9:31 pm
by jschrauwen
4u2nv wrote:babyblueMX3 wrote:nope once your ecu will be in the egr will be useless anyways.. so just leave it unplug and plug the underside of the egr valve so their's no leak. Make sure the the hole on the rear manifold is blocked too if you ain't using the egr.
so 1.8ecu + egr for emissions test.
then kl31 + egr remove/block afterward
dont have my ze manifold pluged and it doesn't leak ... I think when you screw in the egr pipe it opens the port // if there is no pipe no leak... I've reved up the engine with my finger on the hole and there is no suction.
Are you saying you have remnent EGR equipment on your ZE? If so how did it get there?
Posted: April 14th, 2005, 11:01 pm
by 4u2nv
jschrauwen wrote:4u2nv wrote:babyblueMX3 wrote:nope once your ecu will be in the egr will be useless anyways.. so just leave it unplug and plug the underside of the egr valve so their's no leak. Make sure the the hole on the rear manifold is blocked too if you ain't using the egr.
so 1.8ecu + egr for emissions test.
then kl31 + egr remove/block afterward
dont have my ze manifold pluged and it doesn't leak ... I think when you screw in the egr pipe it opens the port // if there is no pipe no leak... I've reved up the engine with my finger on the hole and there is no suction.
Are you saying you have remnent EGR equipment on your ZE? If so how did it get there?
WA? no i'm saying if you screw in the egr pipe to the manifold then you would have a leak. I have the MS-8 manifold, similar to the millenia but same runners as the regular ze manifold. I guese the MS-8 had EGR.