Quote:
Originally Posted by beerdog1
Regarding failing emissions testing with a catless down pipe. Is this because there will be a trouble code? Can't this be dealt with in a tune?
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I'm not an ECU expert by any means, but as I understand it most tunes just suppress the check system so the cat is never in the 'Ready' state and that's why it fails. Maybe it's possible to specifically take care of that, but I don't think any of the off the shelf tunes do.