A bad gas cap can cause a small leak code if the cap is missing or loose you would set a large leak code.I posted a bulletin about setting that codes but you would see smoke leaking from the canister but worth a look. If you have a clogg or restriction stopping the vacuum from getting to the gas tank and the fuel pressure sensor to read the vacuum then it could sett a code. Its easy to see if there is a restriction. Unhook the evap hoses and see if you can easly blow there the lines canister etc. Its going to be hard t diagnose without atleast a smoke machine.I have seen intermintant leaks cause by fuel filler neck fuel pump module seals all kinds of crazy things.
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Sunday, October 2nd, 2011 AT 8:52 PM