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Jim Pasha, the writer of the Tech Forum column in Excellence magazine, makes an interesting point on changing the Boxster (and 996) air filter system.
He says that if you change to a K & N or similar type filter that requires the filter element to be oiled, the oil can get on the mass-air sensor wire used to meter the air/fuel mixture, throwing off the calibration. This causes the Motronic computer to turn on the "check engine" light, and the engine power is dialed back until the situation is corrected. His recommendation is to stick with the factory paper filter.
If you have access to a copy of the August, '04 issue of Excellence, the item is on pg. 168.
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