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Old 08-14-2013, 12:33 PM   #2
thstone
Certified Boxster Addict
 
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,669
I'd start by inspecting/replacing the specific coil packs (cyls 4,5,6) related to the fault codes. Then clear codes and drive.

P0304 - Cylinder 4 misfire damaging to cat converter
P0305 - Cylinder 5 misfire damaging to cat converter
P0306 - Cylinder 6 misfire damaging to cat converter
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1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
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Last edited by thstone; 08-14-2013 at 12:37 PM.
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