EGR valve, can you take them off?
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Joined: Nov 2002
Posts: 108
From: Hartland, MI
EGR valve, can you take them off?
Can you take the egr valve off? Is it good or pointless to do? How do you work with the computer if you do take it off? What do you do when you get an LS6 intake? haha lots of questions
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Joined: Sep 2002
Posts: 1,419
From: Coquitlam, British Columbia
OK....the EGR IMO opinion is useless...I deleted mine....for those of you that want an LS6 intake some do have the EGR built in...the EGR is only good for emission, cleaner air and crap. You will not pass any emission test once you delete this also you'll throw a code..no big deal..delete he code as well. The upside to deleting the EGR is that it wil clean up the engine bay quite a bit and your internals...believe it or not. You'll notice when you remove the intake you'll see quite a bit of black crap around the ports...that's caused by the EGR. You will not gain any hp at all...so the choice is yours...alot of guys delete it.
good luck
good luck
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Registered User
Joined: Nov 2002
Posts: 108
From: Hartland, MI
Do you just delete the code once and it never returns or will the code keep comming back? Also, doesn't the EGR vavle help cool the engine by cooling the air that circulates through it?
Last edited by longgunn; Apr 26, 2003 at 05:48 PM.
Registered User
Joined: Sep 2002
Posts: 1,419
From: Coquitlam, British Columbia
Originally posted by longgunn
Do you just delete the code once and it never returns or will the code keep comming back? Also, doesn't the EGR vavle help cool the engine by cooling the air that circulates through it?
Do you just delete the code once and it never returns or will the code keep comming back? Also, doesn't the EGR vavle help cool the engine by cooling the air that circulates through it?
Once you delete with lS1 edit or Predator it will not come back...as for the cooling theory..good question, but I don't think so...
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Joined: Nov 2002
Posts: 383
From: Goleta, CA
EGR Cooling the air that circulates it ?? No, EGR is short for Exhaust Gas Recirculation, which in a nutshell takes the unburnt fuel that exits through the exhaust and forces it back into the intake manifold to be reburned..
If your car came with egr and you want to get the LS6 Intake, your best bet is to buy an LS6 intake with egr, especially if you live in a state where you have emission checks (i.e. Like CA with Smog Inspections).. If you don't have smog inspections, then get an LS6 intake w/out egr and then have a shop with LS1 Edit, reprogram your computer to actually ignore the egr code...
If your car came with egr and you want to get the LS6 Intake, your best bet is to buy an LS6 intake with egr, especially if you live in a state where you have emission checks (i.e. Like CA with Smog Inspections).. If you don't have smog inspections, then get an LS6 intake w/out egr and then have a shop with LS1 Edit, reprogram your computer to actually ignore the egr code...
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Joined: Jan 2001
Posts: 81
From: big "T"
Originally posted by dmnall
EGR Cooling the air that circulates it ?? No, EGR is short for Exhaust Gas Recirculation, which in a nutshell takes the unburnt fuel that exits through the exhaust and forces it back into the intake manifold to be reburned..
If your car came with egr and you want to get the LS6 Intake, your best bet is to buy an LS6 intake with egr, especially if you live in a state where you have emission checks (i.e. Like CA with Smog Inspections).. If you don't have smog inspections, then get an LS6 intake w/out egr and then have a shop with LS1 Edit, reprogram your computer to actually ignore the egr code...
EGR Cooling the air that circulates it ?? No, EGR is short for Exhaust Gas Recirculation, which in a nutshell takes the unburnt fuel that exits through the exhaust and forces it back into the intake manifold to be reburned..
If your car came with egr and you want to get the LS6 Intake, your best bet is to buy an LS6 intake with egr, especially if you live in a state where you have emission checks (i.e. Like CA with Smog Inspections).. If you don't have smog inspections, then get an LS6 intake w/out egr and then have a shop with LS1 Edit, reprogram your computer to actually ignore the egr code...
Registered User
Joined: Feb 2000
Posts: 607
From: Casselberry FL USA
It won't hurt the car. You'll just get an SES. If you have access to an OBDII scanner, you can clear the code but it'll come back. You'll need to have the DTC status changed in the PCM to prevent this recurring SES.
Like others have stated, you can buy the GM LS6 intake which doesn't offer EGR compatibility, or you can buy one modified buy a vendor and keep your EGR.
You'll also need a block-off plate for the EGR bung on your passenger manifold/header.
Like others have stated, you can buy the GM LS6 intake which doesn't offer EGR compatibility, or you can buy one modified buy a vendor and keep your EGR.
You'll also need a block-off plate for the EGR bung on your passenger manifold/header.
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Joined: Nov 2002
Posts: 383
From: Goleta, CA
Originally posted by amood
Actually your first paragragh describing the EGR is innacurate. The Egr recirculates exhaust into the A/F mixture during warm up to reduce combustion temp. The "logic" behind the idea is to cut down on nitrogen oxide compounds for the couple of minutes that warm up combustion conditions exist. Afterward the exhaust is re-routed directly to the exhaust manifold for the purpose of reducing hydrocarbons (unburnt fuel).
Actually your first paragragh describing the EGR is innacurate. The Egr recirculates exhaust into the A/F mixture during warm up to reduce combustion temp. The "logic" behind the idea is to cut down on nitrogen oxide compounds for the couple of minutes that warm up combustion conditions exist. Afterward the exhaust is re-routed directly to the exhaust manifold for the purpose of reducing hydrocarbons (unburnt fuel).
Charlie
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Joined: Jul 1998
Posts: 6,247
From: Charlotte,MI USA
Originally posted by amood
Actually your first paragragh describing the EGR is innacurate. The Egr recirculates exhaust into the A/F mixture during warm up to reduce combustion temp. The "logic" behind the idea is to cut down on nitrogen oxide compounds for the couple of minutes that warm up combustion conditions exist. Afterward the exhaust is re-routed directly to the exhaust manifold for the purpose of reducing hydrocarbons (unburnt fuel).
Actually your first paragragh describing the EGR is innacurate. The Egr recirculates exhaust into the A/F mixture during warm up to reduce combustion temp. The "logic" behind the idea is to cut down on nitrogen oxide compounds for the couple of minutes that warm up combustion conditions exist. Afterward the exhaust is re-routed directly to the exhaust manifold for the purpose of reducing hydrocarbons (unburnt fuel).
The EGR system recirculates exhaust gasses into the intake to be reburnt at certain cruise conditions.
They are both to reduce emissions A.I.R. at startup (that's the electric motor noise that you hear for a little while right after you start your car) and EGR at cruise.
And both can be done away with in none emission testing states with proper computer tuning.
Registered User
Joined: Sep 2002
Posts: 17
From: San Diego
Originally posted by AL SS590 M6
ACTUALLY what you are describing is the A.I.R. system and it's fresh filtered air into the exhaust stream.
The EGR system recirculates exhaust gasses into the intake to be reburnt at certain cruise conditions.
They are both to reduce emissions A.I.R. at startup (that's the electric motor noise that you hear for a little while right after you start your car) and EGR at cruise.
And both can be done away with in none emission testing states with proper computer tuning.
ACTUALLY what you are describing is the A.I.R. system and it's fresh filtered air into the exhaust stream.
The EGR system recirculates exhaust gasses into the intake to be reburnt at certain cruise conditions.
They are both to reduce emissions A.I.R. at startup (that's the electric motor noise that you hear for a little while right after you start your car) and EGR at cruise.
And both can be done away with in none emission testing states with proper computer tuning.
This man is entirely correct.
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Joined: Jan 2001
Posts: 81
From: big "T"
Sorry about the confusion but my description of the EGR in the way that it works IS correct. The fact that I needed to wake up a little more before posting is the reason why I confused the routing issue of the EGR with the AIR system. By mixing the two system functions I did confuse the truth there. So, I'll lay them both out to square myself away on this subject for the original and subsequent "posters".
The EGR DOES recirculate exhaust into the intake air during warmup to reduce combustion temps. for the reasons I gave at the first. After that it is metered into the intake air depending on operating conditions.
The AIR system feeds fresh air into the exhaust stream either at the manifold or at the cat. conv. depending on operating conditions (hot/cold) for the express purpose of burning....or converting..... unspent fuel in the exhaust. It pumps fresh air into the manifold when cold...... and the cat during normal operation temps. Tricky though;----the AIR system is also credited with helping to warm up the cat to the proper temp range during warm up.
So there it is in it's simplest form. The EGR essentially cools combustion temps for emmissions purposes----
and the AIR heats up the exhaust temps for the same cause.
How's that? I'm still sleepy even NOW.....but I'm pretty sure I paid better attention to what I was saying!!!
The EGR DOES recirculate exhaust into the intake air during warmup to reduce combustion temps. for the reasons I gave at the first. After that it is metered into the intake air depending on operating conditions.
The AIR system feeds fresh air into the exhaust stream either at the manifold or at the cat. conv. depending on operating conditions (hot/cold) for the express purpose of burning....or converting..... unspent fuel in the exhaust. It pumps fresh air into the manifold when cold...... and the cat during normal operation temps. Tricky though;----the AIR system is also credited with helping to warm up the cat to the proper temp range during warm up.
So there it is in it's simplest form. The EGR essentially cools combustion temps for emmissions purposes----
and the AIR heats up the exhaust temps for the same cause.
How's that? I'm still sleepy even NOW.....but I'm pretty sure I paid better attention to what I was saying!!!
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