Engine Mechanical problem
1997 Chevy Malibu 6 cyl Front Wheel Drive Automatic 97000 miles
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I have a 1997 malibu, had a scan done for a check light. it said that I have a evap system leak. what is the best way to check the purge valve, and the vent valve. I have replaced the gas cap and checked the vac,lines already

was it a large leak or a small leak. i think i would just replace the vent valve for as often as they fail