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Old Dec 4, 2008 | 06:48 PM
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Default O2 sensor Question
I'm have a problem with my O2 sensors. The car goes full rich both banks between 30-40 mph low rpm. Is there any way of telling which one of the 4 is going bad? Its an intermitten problem but gettig worse. Charley at RPM looked at some data I sent him and thinks they are slow to respond. Thanks, Laurence
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Old Dec 4, 2008 | 07:29 PM
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Originally Posted by brit2001
I'm have a problem with my O2 sensors. The car goes full rich both banks between 30-40 mph low rpm. Is there any way of telling which one of the 4 is going bad? Its an intermitten problem but gettig worse. Charley at RPM looked at some data I sent him and thinks they are slow to respond. Thanks, Laurence
What are the codes...

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Old Dec 4, 2008 | 07:45 PM
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I get 0172 and 0175 too rich bank 1 and 2 and it will get surging so bad I get an intermitten misfire code.
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Old Dec 4, 2008 | 07:51 PM
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Originally Posted by brit2001
I get 0172 and 0175 too rich bank 1 and 2 and it will get surging so bad I get an intermitten misfire code.
Ok,

what are the mods on the car if any...

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Old Dec 4, 2008 | 07:58 PM
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Old Dec 4, 2008 | 09:37 PM
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Long tube headers, high flow cats, borla exhaust, BBK intake throttle body and manifold, 3:42 rear end and a Yank 3200 stall. The cars an A4.
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Old Dec 7, 2008 | 01:30 PM
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I changed the front O2 sensors to see if that fixes it. I'll let you know.
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