Code P0300 after CBE install

Originally Posted by ProfessorDave

Jordo, I wondered about moisture getting into something. I've had EGR valves go bad on other cars in wet weather, but will consider the coilpack, too.

The evap canister cover (rear p-side of the car) has to be removed for the Fast Intentions right muffler to fit. The cover isn't sealed, it's just there to add protection to the lines. Since I did not get a P01XX code (which is where the EVAP specific codes live, I believe), I didn't think this was the cause. But I'm paranoid about having warranty work denied because of mods.

The only other mod I have are K&N drop in filters. They've been installed for 3 months (2 months ahead of the exhaust install) and had no problems.