smog pump delete
Freshman User
Joined: Jul 2003
Posts: 49
Likes: 0
smog pump delete
But, the whenever the EGR comes on, the ECM is in closed loop, so it is controling the mixture based on the O2 senser. If the EGR doesn't open, and it goes lean, it will immediately adjust because the O2 sensor says it is lean.
With my mustangs, I have removed or disconnected the EGRs on all of them, and have no lean issues. I have dyno'ed one of them with a wide band O2 hooked up, and would have noticed it lean out when warming up the car before the run (constant low throttle warmup).
With my mustangs, I have removed or disconnected the EGRs on all of them, and have no lean issues. I have dyno'ed one of them with a wide band O2 hooked up, and would have noticed it lean out when warming up the car before the run (constant low throttle warmup).
Elder User
Joined: Jan 2003
Posts: 539
Likes: 0
smog pump delete
To avoid the CEL from removing the EGR, mount your EGR valve on the fender well and run the wiring and the vacuum to it. The computer does not know if it is flowing exhaust gas or not, just if its plugged in. Like stated above, the O2 sensor will compensate for a lean or rich condition. That is an afterthought of introducing exhaust gases in the combustion chamber.
If you want the egr system gone completely, you will have to put up with the CEL or disconnect the bulb.
If you want the egr system gone completely, you will have to put up with the CEL or disconnect the bulb.
Posting Guru
Joined: Mar 2003
Posts: 1,349
Likes: 3
From: Cloud USA
smog pump delete
You are better off removing the vacuum line and sticking a bolt in it, Then the ECM thinks the vavle is closed and wont adjust timing and mixture. I have had bad pinging and drivabiltity because of this
New User
Joined: Feb 2007
Posts: 1
Likes: 0
95 f-350 460
Originally Posted by MrCarlsonq
But, the whenever the EGR comes on, the ECM is in closed loop, so it is controling the mixture based on the O2 senser. If the EGR doesn't open, and it goes lean, it will immediately adjust because the O2 sensor says it is lean.
With my mustangs, I have removed or disconnected the EGRs on all of them, and have no lean issues. I have dyno'ed one of them with a wide band O2 hooked up, and would have noticed it lean out when warming up the car before the run (constant low throttle warmup).
With my mustangs, I have removed or disconnected the EGRs on all of them, and have no lean issues. I have dyno'ed one of them with a wide band O2 hooked up, and would have noticed it lean out when warming up the car before the run (constant low throttle warmup).
Junior User
Joined: Aug 2006
Posts: 99
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Senior User
Joined: Jul 2004
Posts: 376
Likes: 0
how about that black plastic small car battery sized thing on the passenger side inner fender....with the vacuum lines going in - out of it?.....what is that thing????....and can I just plug all the lines and be OK?...the previous owner took off the cat and the air pump is pumping to atmosphere. Its a 7.5 liter...but the small blocks have this clutter too.
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Posting Guru
Joined: Dec 2006
Posts: 1,020
Likes: 2
From: vernon hills IL
that is the proper way to do it , if you leave it where the cel is on you will have driveabilty issues due to the computer being in limp mode . so you have to have the bypass connector deals like above or you need to have a tune that turns off the functions inside the pcm . great link btw trickedout420
Hotshot
Joined: Oct 2003
Posts: 17,791
Likes: 99
From: Ashland City, TN
Sounds like this is a pretty popular issue, Maybe a few of our members with expereince should write an article about it.
That way we have something to point new users too when they ask.
This is something i'm interested in also. Haveing issues with mine being all cut up, and my truck not performing the way it should due to the previous owners stupidity.
That way we have something to point new users too when they ask.
This is something i'm interested in also. Haveing issues with mine being all cut up, and my truck not performing the way it should due to the previous owners stupidity.