Explain A.I.R. System
Thread Starter
Registered User
Joined: May 2001
Posts: 309
From: Ft. Rucker, AL
Explain A.I.R. System
I'm having problems troubleshooting mine and I want to make sure I have this right:
On a cold start, the AIR Pump pushes warm air through the cats, thus heating them up faster and preserving their lives. More specifically, it pulls air from the air intake, pushes it to the air shutoff valve (or whatever that EGR looking thing is at the back of the engine), which divides the air between the driver and passenger sides of the engine.
I'm getting a "secondary air injection malfunction" (P0410) but the air pump is working properly. Everything seems to be working!
What am I missing?! Help!
On a cold start, the AIR Pump pushes warm air through the cats, thus heating them up faster and preserving their lives. More specifically, it pulls air from the air intake, pushes it to the air shutoff valve (or whatever that EGR looking thing is at the back of the engine), which divides the air between the driver and passenger sides of the engine.
I'm getting a "secondary air injection malfunction" (P0410) but the air pump is working properly. Everything seems to be working!
What am I missing?! Help!
Registered User
Joined: Dec 1969
Posts: 27,727
From: Little Rock, AR
Re: Explain A.I.R. System
AIR has nothing to do with the EGR.
What the AIR system does is provide extra air (not warm air) to the cats when the engine is cold and running a rich mixture. This helps get the cats warmed up faster to aid in reducing emissions.
What the AIR system does is provide extra air (not warm air) to the cats when the engine is cold and running a rich mixture. This helps get the cats warmed up faster to aid in reducing emissions.
Thread Starter
Registered User
Joined: May 2001
Posts: 309
From: Ft. Rucker, AL
Re: Explain A.I.R. System
Yea, I know the difference between AIR and EGR. BUT, there is a disc on the driver's rear side of the engine that has a resemblance to an EGR valve. It's called the air shutoff valve, I believe. And it's part of the AIR system.
Registered User
Joined: Dec 2003
Posts: 1,526
From: Madison, Wi
Re: Explain A.I.R. System
Originally Posted by mark896
Yea, I know the difference between AIR and EGR. BUT, there is a disc on the driver's rear side of the engine that has a resemblance to an EGR valve. It's called the air shutoff valve, I believe. And it's part of the AIR system.
Registered User
Joined: Dec 1969
Posts: 27,727
From: Little Rock, AR
Re: Explain A.I.R. System
Originally Posted by mark896
Yea, I know the difference between AIR and EGR. BUT, there is a disc on the driver's rear side of the engine that has a resemblance to an EGR valve. It's called the air shutoff valve, I believe. And it's part of the AIR system.
[edit] I do see the shutoff valve (added in 2000) in the part book diagram, but I can't tell you how to troubleshoot the LS1 system.
Last edited by shoebox; Oct 17, 2005 at 07:52 AM.
Registered User
Joined: Dec 2003
Posts: 1,526
From: Madison, Wi
Re: Explain A.I.R. System
Originally Posted by TABAHR
That thing at the back of the intake manifold is a EGR valve. It has nothing to do with the AIR system. The air pump housing has a solonoid/shutoff valve built into it, and the air gets pumped directly from the pump output to the exhaust manifolds.
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