Let me know if you find out that's what it is. I have the same problem ever since the fuel pump install, and I checked to see if we pinched a line but they seem to be free with nothing clamping down on them.
Eric, If you just follow that line from the old charcoal canister back to the fenderwell and cut it and tuck it away inside the fender there's no need to plug it up.
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Gunning for 12's!
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