Hello. Every 200 to 300 miles the cel illuminates and the codes are 1328 and 1330. Lately the 0704 fault code comes up with these codes. I have replaced the oil cap seal and fuel filter. Before I look for vacuum leaks is there anything else that could trigger these faults?
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Finding Vacuum Leaks on the Porsche 911 Carrera - 996 (1998-2005) - 997 (2005-2012) - Pelican Parts Technical Article