check engine light that scans "Emission Gross Leak" I change the gas cap...

i would look at the hoses very carefully. there is one or more leaking causing the leak. without a smoke machine, it will not be easy. Roy

Like Roy stated, the Evap systems are very difficult to locate leaks without the proper equipment that a AAA/ASA Repair Shop would have. Even with the right equipment it is sometimes difficult to locate these leaks. I would recommend getting your vehicle into a known reliable shop and have them do the hard work of diagnosing. George