how to disable EGR ?

[MHB86Prelude]

I want to take the egr out. I got a header off a 89 LXi, But the egr hole is welded shut. can I take the egr out of my car I have the BT(A20) engine? Thanks

[ghettogeddy]

is there one hole or 2
and do u know what header it is stock ,dc, pacesetter and are u carbed or fi all this info is important

[shepherd79]

what do you mean it is welded shut?
you can block it off but it would be against the law. If you get caught it is $5000 fine.

[ghettogeddy]

what do you mean it is welded shut?
you can block it off but it would be against the law. If you get caught it is $5000 fine.
thats why im woundering if it was on a fi 3g and it might be a dc or pacesetter

[MHB86Prelude]

No its the stock header that comes in the FI LXI. My car is a prelude si with the A20 engine FI. Have any of you guys done this?
Heres a link.. http://preludepower.com/forums/showthread.php?t=254686

Thanks

[ghettogeddy]

well the reson i ask is the carb version has 2 egr and the lxi version has 1

[shepherd79]

actually,
all A20A headers have EGR conectors, even pacessetter and DC.

Stock EFI have 1 connection for EGR.
carb has 2 connections on the header. One is for EGR (it is in the same location as on EFI). the other connector is for air sucktion valve that EFI don't have it.


i see what you did. YOU wleded the EGR fitting.
you take the pipe, cut it and crimp it, or you can make a little block off plate and bolt it on.

[MHB86Prelude]

But how about the Wires that come out of the EGR?

How do I post pics on here? so I can take a pic of the wires, so U guys know which one I'm talking about.

Thanks

[shepherd79]

you can not unplug electrical or vacuum connector, because it will triger ECU light.
the only way to get rid of it if you convert to OBD1.

[cygnus x-1]

I just looked this up in my 'lude shop manual.
On a FI engine you can't totally remove the EGR valve because the computer senses the position of the valve. You can pull it off the intake manifold and block off the opening but the valve still has to be connected to the electrical and vacuum connections. If either the electrical or vacuum are disconnected the computer will know and will issue a code.
If I were you I would leave the valve in place and just block the tube at both manifolds. Keep in mind though that this could possibly fail emmisions testing depending on the testing. It would at least let you drive until you can figre out a way to get that tube out of the exhaust manifold.

C|

[MHB86Prelude]

I blocked the EGR by puting a plat in between the EGR & the whole on the intake main. Worked out fine. Thanks

[bushbean]

Am I right to say the EGR is totally useless save for lower emission?

[shepherd79]

what do you mean for lower emissions?
do you mean lower RPM emissions?
well it operates at any RPM. That is why there is a vacuum valve. It opens and closes when computer says.

[bushbean]

what do you mean for lower emissions?
do you mean lower RPM emissions?
well it operates at any RPM. That is why there is a vacuum valve. It opens and closes when computer says.

I mean, if I live in a third world country where there is no emission control, can I just remove the EGR valve and plug up the holes?

[MessyHonda]

I mean, if I live in a third world country where there is no emission control, can I just remove the EGR valve and plug up the holes?


yeah but then the check engine light might go on.

[MHB86Prelude]

I pluged all the holes then I put the EGR back. Works fine.

[blh1983]

Wouldn't a JDM/EDM ECU also do the trick??
you can not unplug electrical or vacuum connector, because it will triger ECU light.
the only way to get rid of it if you convert to OBD1.

[firefighterwhite89]

Doesn't the engine run rich or something like that when it throws the EGR code? i thought i read where someone said something like that and was just curious?

[Demon1024]

Wouldn't a JDM/EDM ECU also do the trick??

I think it's the euro and Canadian ones that don't have it. A20a2 and A20a4 if i'm not mistaken.

Unless you just have to have it off the intake mani... just block it off and keep it connected. Or block it off and relocate it.

[1987AccordLx-i]

Doesn't the engine run rich or something like that when it throws the EGR code? i thought i read where someone said something like that and was just curious?

when egr goes off it wont idle right. mine went out and it wouldnt idle... not sure about the rich part

[Demon1024]

It goes into closed loop mode any time the cel comes on. The ecu doesn't take in readings from a few senors and runs a programed map which for safety reasons is rich.

Not having the egr preforming it's function to your car won't affect your idle
The ecu knowing you don't have an egr will affect idle

[2oodoor]

if you can get passed electronic garbage affecting idle speeds it is perfectly fine to do away with egr, these do not go thru any head ports.. it all happens in the intake manifold.
Im carbed and I cut the egr completly out with a milling machine. Yiou can also use a B16 intake manifold that has no egr plumbed at all if youre EFI and IM sure you will find some bypass solutions here if you searched a bit.

[MessyHonda]

yeah but then the check engine light might go on.


i ran my can on a stock ECU and the check engine light came on after the b16 manifold swap...my car always ran rich so i could not tell if this mod made it run rich or lean

[phrenology]

When I got my car the EGR valve was busted...ECU threw me the code and the car idled like shit, kept stalling. I wouldn't recommend messing with it unless you have no emissions testing where you are, and you have a way to by pass the ECU readings for the EGR valve and lift sensor.

[ecogabriel]

I just looked this up in my 'lude shop manual.
On a FI engine you can't totally remove the EGR valve because the computer senses the position of the valve. You can pull it off the intake manifold and block off the opening but the valve still has to be connected to the electrical and vacuum connections. If either the electrical or vacuum are disconnected the computer will know and will issue a code.
If I were you I would leave the valve in place and just block the tube at both manifolds. Keep in mind though that this could possibly fail emmisions testing depending on the testing. It would at least let you drive until you can figre out a way to get that tube out of the exhaust manifold.

C|

x2

The car will fail the NOx part of the test; the EGR valve lowers combustion chamber temperature to reduce NOx formation.
No valve / inoperative valve = High NOx => emissions failure (and code 12)

Note that you may still have a NOx failure without the code, the most likely cause is plugged EGR passages most likely in the intake manifold (a common failure for 3G and 4G accords) Our ECUs do not test for actual EGR flow like OBDII cars do.


when egr goes off it wont idle right. mine went out and it wouldnt idle... not sure about the rich part


When I got my car the EGR valve was busted...ECU threw me the code and the car idled like shit, kept stalling. I wouldn't recommend messing with it unless you have no emissions testing where you are, and you have a way to by pass the ECU readings for the EGR valve and lift sensor.

That happens when the valve is partially opened. EGR does not work at idle but if it is stuck partially opened the car will idle like s...
Same thing can be done by applying vacuum to a good working valve at idle; engine will run rough or die almost immediately

EGR allows the car to run with a more lean mixture. Extra fuel in the mix will reduce combustion chamber temperature (and reduce NOx formation) at the price of increasing other pollutants

You may read the following link for more details. Pages 3 and 4 talk a little on emission failures, what causes them and how some interact with others.

(warning: cover your noses; it's a Toyota document) :rocket:

http://www.autoshop101.com/forms/h56.pdf