LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Code 29 - Secondary Air Injection (AIR) Pump Circuit

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Old 06-01-2006, 02:12 PM
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Code 29 - Secondary Air Injection (AIR) Pump Circuit

It's blowing the AIR fuse under the hood. If I just pull the relay for the pump will everything be ok? I looked at the wires going into the pump and they look fine, and when I replace the fuse the pump runs, but then blows after driving for a while.
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Old 06-01-2006, 02:37 PM
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Re: Code 29 - Secondary Air Injection (AIR) Pump Circuit

Just unplug the pump.
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Old 06-01-2006, 02:42 PM
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Re: Code 29 - Secondary Air Injection (AIR) Pump Circuit

put a higher amp fuse it will be fine
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Old 06-01-2006, 03:08 PM
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Re: Code 29 - Secondary Air Injection (AIR) Pump Circuit

If you want to disable the pump, just unplug it's electrical connector and make sure there is a good fuse in the fusebox. Normally, the computer will not complain if you do it this way.
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Old 06-01-2006, 03:30 PM
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Re: Code 29 - Secondary Air Injection (AIR) Pump Circuit

Originally Posted by shoebox
If you want to disable the pump, just unplug it's electrical connector and make sure there is a good fuse in the fusebox. Normally, the computer will not complain if you do it this way.
Trying this method right now.
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Old 06-15-2006, 10:25 AM
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Re: Code 29 - Secondary Air Injection (AIR) Pump Circuit

Originally Posted by KyleBlue85Iroc-Z
Trying this method right now.
Just wondering if this worked for you. Mine is running right after start up and is loud, also it keeps kicking on and off.
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Old 06-15-2006, 11:57 AM
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Re: Code 29 - Secondary Air Injection (AIR) Pump Circuit

Yeah, I just replaced the fuse, cleared the code and unplugged the connector on the pump. Since then it's been fine. Now I'm wondering if my car is running worse because it thinks the pump is working?

But to answer your question, yes, the method worked!
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Old 06-15-2006, 02:30 PM
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Re: Code 29 - Secondary Air Injection (AIR) Pump Circuit

Your car isn't "running worse because it thinks the pump is working". The AIR pump only runs for a couple minutes at start up, to burn excess fuel in the exhaust and help the cat(s) heat up faster. After that it shuts down. Has no affect in any way on the way the engine runs.

95 and newer LT1's are covered by a "recall" on the AIR pump, in the event you would like to keep it working.
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Old 06-15-2006, 07:28 PM
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Re: Code 29 - Secondary Air Injection (AIR) Pump Circuit

Originally Posted by Injuneer
Your car isn't "running worse because it thinks the pump is working". The AIR pump only runs for a couple minutes at start up, to burn excess fuel in the exhaust and help the cat(s) heat up faster. After that it shuts down. Has no affect in any way on the way the engine runs.

95 and newer LT1's are covered by a "recall" on the AIR pump, in the event you would like to keep it working.
That recall # is 99083
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Old 06-16-2006, 05:36 PM
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Re: Code 29 - Secondary Air Injection (AIR) Pump Circuit

They still honor recalls on my car?
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Old 06-17-2006, 03:18 PM
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Re: Code 29 - Secondary Air Injection (AIR) Pump Circuit

Recalls are driven by emissions requirements, repairs of which may extend well beyond the normal warranty period for the rest of the car.
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