Start with cleaning the MAF sensor. CRC makes a special MAF sensor cleaning product. Should be able to find it at any auto parts store. While you're there you will need to get a T20 tamper-proof Torx bit to remove the screws on the MAF sensor.
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2003 Boxster S
| 987 Air Box | K&N Air Filter | 76mm Intake Pipe| 996 76mm TB | 997 Distribution T | Secondary Cat Delete Pipes | Borla Muffler | NHP 200 Cell Exhaust Headers |
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