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Old 05-07-2006, 12:18 AM   #1 (permalink)
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P0411 is Secondary Air Injection System Incorrect Flow
I have searched the forum and found several threads. Someone suggested disabling the sensor. If I know where it is, I want to disable it. Please let me know how to.
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Old 05-07-2006, 10:35 PM   #2 (permalink)
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I know Secondary Air Pump injects air to exhaust during warmup. Is it the only functiton of Secondary Air Pump?
Thanks.
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Old 05-08-2006, 12:07 AM   #3 (permalink)
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The pump isn't operating. You can try to make it work with lots of WD40 and white grease if the engine is just seized. It is located under the battery, but a bit closer to the front of the car. Spray stuff up its intake tube if you can find it.
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Old 05-31-2006, 04:05 PM   #4 (permalink)
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I live in Michigan, which doesn't require strict emissions. Apparently my '97 is from Cali, so it has California emissions. I needed to replace the EGR valve and tube with it to the exhuast manifold, but my model has the secondary air injection system being a California emissions car. I went to all junkyards/Ford dealerships in the Detroit area, and they didn't know what I was talking about because the tube has 3 branches coming off it as opposed to 2 for non California emissions models. Is there a way to delete the secondary air injection system so I can just throw a 2 end tube on my car?
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Old 05-31-2006, 04:12 PM   #5 (permalink)
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The SAI pump was only put in California SLOs and all SHOs.

It injects extra oxygen into the intake to help combust the fuel until the catalytic convertors get to operating temperatures (20-120 seconds I believe)

Usually the cause is a bad relay. It is external to the pump and bolts right to the side of it.

You can just remove it, and then you'll have to get either a chip or a tuner to reprogram your EEC to ignore the system. Otherwise you'll always have the CEL.
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Old 05-31-2006, 04:21 PM   #6 (permalink)
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Hello. Thanks for letting me know. But I wonder if I did remove the pump, it won't mess with my gas mileage, or fuel/air patterns and what not. Besides the light being on all the time, it won't cause any other problems to drivability, right? I can live with the SES light being on as long as the delete doesn't mess up the car. Thanks
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Old 05-31-2006, 04:27 PM   #7 (permalink)
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No, it won't affect the engine at all. It's simply an emissions thing. I know of a couple Gen III SHO guys who removed the system entirely without a problem.


Just FYI, you can buy a 24 volt light bulb for the CEL instead of the stock 12V bulb. Because it's designed to have a higher potential difference, it is much dimmer. That'll make it easier on the eyes at night.

Oh, and I bought a new relay used for $10 and replaced it on my SHO when it went bad. No problems since.
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Old 05-31-2006, 05:07 PM   #8 (permalink)
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Cool. I just want to make sure. A new tube from Ford is like $70. I can gank one of those 2 end tubes from the junkyard for nothin if I delete the pump. I assume that the pump just unbolts from where ever it sits, right? I know where it's at, by the battery, but I didn't look at it in great detail.
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Old 05-31-2006, 05:09 PM   #9 (permalink)
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Yeah, but the problem is getting it out. It actually bolts onto the subframe on the driver's side right next to the front subframe mount. You have to partially drop the subframe to get it out, or pull the battery and remove the tray (it's below the battery).
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Old 05-31-2006, 05:40 PM   #10 (permalink)
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I assume pulling the battery + tray is the easier, huh?

Also, I don't need to cap or plug anything off right? I figure it's all taken care of when the new tube is installed and the pump is deleted.
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