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Old 04-03-2016, 03:32 PM   #1
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Retune after cat delete

Deleting my cats today or tomorrow do I have to retune my car with my SFX3 tuner or can I just leave it
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Old 04-03-2016, 03:36 PM   #2
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Get it tuned. Make sure the downstream O2 sensors are turned off.


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Old 04-03-2016, 06:17 PM   #3
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You'll throw a CEL if you don't.


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Old 04-03-2016, 09:36 PM   #4
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Do I just have to clear the code ?
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Old 04-03-2016, 09:38 PM   #5
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Retune after cat delete

Get a new tune from your provider for no cats.


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Old 04-03-2016, 09:45 PM   #6
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Ya I tried they said they couldn't, its bama but I think it's because I used a different email account
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Old 04-04-2016, 11:25 AM   #7
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There isn't any performance benefit to deleting the cats on the 4.0. All you get is a lousy exhaust note.
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