S2000 Under The Hood S2000 Technical and Mechanical discussions.

How to diagnose secondary air pump problem

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Old Aug 14, 2005 | 04:08 PM
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Default How to diagnose secondary air pump problem

So my check engine light comes on as i'm leaving work last week, so I run the code and its my secondary air pump system.
I checked the fuse and it appears fine and I hear it cut on when I start my car, so what's going on? Do I just need to pull the fuse and disconect the battery to reset the code or is there something i'm missing.

Just got my car and I don't know all the tricks yet
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Old Aug 14, 2005 | 05:14 PM
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You need to scan test it to get the specific code, and fix the problem. No point in reseting a light that will just come back on.
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Old Aug 14, 2005 | 05:22 PM
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tell us what the code is that you pulled so we can tell you what the problem is.

i'm not sure how people think that just pulling the fuse to reset the code will prevent it from coming back? you need to fix the problem that caused the code in the first place! lol
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Old Aug 14, 2005 | 06:19 PM
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Allow me to refrase it because apparently I wasn't clear.

Secondary air sytem problem

I pulled the code with a SCAN TOOL and after trouble shooting it I don't see what's wrong.

From the service manual, the secondary air sytsem blows air onto the cat durrring startup and cold weather. I checked the fuse as listed and checked to make sure the pump was coming on and everything checked out. I may have had a bad connection with the fuse before.

I'm not trying to just reset the light to make the problem go away, but if everything checks out then I want to reset the light to see if the bad connection was the cause.
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Old Aug 14, 2005 | 06:39 PM
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Does the car have an aftermarket intake on it?
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Old Aug 14, 2005 | 06:42 PM
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Yes

ARC

It has been on for some time now
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Old Aug 14, 2005 | 07:00 PM
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there is more to trouble shooting a secondary pump failure than just checking the fuse and looking to see if the pump comes on. again, please post the code. you mentioned the service manual, yet the helm service manual lists several other trouble shooting steps you have either ignored or left out.
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Old Aug 14, 2005 | 07:01 PM
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Let's say you pull the code and it comes out "P0411". This is the only code that will show the word "secondary" is "secondary air injection system - incorrect flow". I'm not sure where you got the "air pump" phrase from but that would be another code.
You say you have an ARC intake. This involved moving, splicing and relocating some critical vacuum lines and a one way check valve. You also say that it's been on for a while, so my guess is only one possibility, however, check it out thoroughly and see if it solves your problem. I don't know what you mean by "some time now" - a few days? a few weeks? a few months?
Follow the steps in this thread:
https://www.s2ki.com/forums/index.php?showtopic=105368
Look at each picture and carefully check each hose fitting for cracks, tightness, correct position. Make sure the check valve is in the right direction. Completely trace all lines and all connections, including the wiring harness at the solenoid to make sure it's not lose or fallen off. Even though you have an ARC, all the lines and check valve and solenoids MUST be in the same orientation.
If you've had the intake for a few weeks, it may have taken this long for the code to show from bad routing of lines and check valve. It may have also been that something has shaken loose or cracked.
Without giving us the actually code, you are simply compelling us to guess.
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Old Aug 14, 2005 | 07:03 PM
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Originally Posted by xviper,Aug 14 2005, 09:01 PM
Without giving us the actually code, you are simply compelling us to guess.
we asked you the code for a reason. is it that hard to just post the code?
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Old Aug 14, 2005 | 07:18 PM
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P0411

The "air pump" phrase came from my foxbody mustang memories.

As far as I know the intake has been on for several months.
I just purchased the car and the previous owner put the intake on and I believe that something probably has come loose.




I have been working non stop in the sun all weekend without much sleep, so I apologize for my incoherent thoughts tonight. It seems there's never enough time between work to get things done
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