'01 BosxterS Tip Misfire

[SteveCo]

Under normal driving conditions I don't have any issues. If I am pulling to pass some one or trying (desperately) to keep up with a GT3 I get a flashing CEL and codes P0300, P0303 and P306. Motor has approx 93k on it plugs, IMS, AOS done at 83k. Thanks

[Matt at Pelican Parts]

(CEL) Codes - 986 Forum - for Porsche Boxster & Cayman Owners

P0300 Misfire Damaging to Catalytic Converter

P0303 Misfire, Cylinder 3, Damaging to Catalytic Converter

P0306 Misfire, Cylinder 6, Damaging to Catalytic Converter

Based off the codes you provided it sounds like you need to address cylinder 3 and 6. What condition are the coil packs and spark plug connectors in? They may be fine under normal driving, but unable to cope with heavy driving. it may be time for a new set.

-Matt