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03 problem. Backfire.

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I've got an 03 with an FMF, stock header, loud mouth intake, and recently done the ap mod. I got rid of the bog when you hammer it but now I've got a nasty backfire on decel. I cleaned all the jets before doing the mod. Could this be a jetting problem that can be fixed with a JD kit? Thanks guys.

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If you took the throttle slide plate out you might have put it back in upside down or the pilot jet might be clogged.

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1 1/2 is stock. So I have it there. So try 2 1/2??? Does turning it out make the mixture richer???

Btw my leak jet is 90 for the ap mod.

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Yes going out is richer. But i would check for an exhaust leak first , and a clogged pilot jet , that your best bet.

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