2004 Wrangler TJ, 42RLE auto trans. F/R lockers, 5.38 gears, Warn Winch, Currie 4" Suspension
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Locking gas caps, even when new, are notorious for leaking air through the key slot that trips the evap leak detector. Are you running an aftermarket locking cap? If so, I'd try a standard non-locking Mopar gas cap.
