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Tune needed for exhaust mods?

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Old 04-18-2019, 02:36 PM
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Default Tune needed for exhaust mods?
Just wondering if a tune is needed for long tubes and cat deletes...
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Old 04-23-2019, 11:18 AM
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I would think you're going to need some way to tell the computer to ignore the codes for the upstream/downstream O2 sensors matching information. Essentially, the computer is going to think your catalytic converters aren't working.
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Old 04-23-2019, 11:30 AM
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Originally Posted by jedg
I would think you're going to need some way to tell the computer to ignore the codes for the upstream/downstream O2 sensors matching information. Essentially, the computer is going to think your catalytic converters aren't working.
Any drivability issues associated with that or just check engine light?
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Old 04-23-2019, 11:34 AM
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Not sure. Look up P0420 and P0430... that may give you some ideas. I don't know if the JK computer will go into limp mode with those codes.
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