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well i got the wonderful ses light and i'm throwing code p420(cat system efficienty below threshold bank 1..
i've had my 3inch exhaust for awhile now and this just happened. i have the full 3inch exhaust and i do have a 02 simm.
also i'm my other post i can hear a hissing noise on the passenger side of my car when IT IS UNDER LOAD and past 3000 rpms. i'm thinking i have a exhaust leak somewhere.
i'm going to the track tommorow and i'm using the giggle gas. i hope nothing goes wrong,,
i've had my 3inch exhaust for awhile now and this just happened. i have the full 3inch exhaust and i do have a 02 simm.
also i'm my other post i can hear a hissing noise on the passenger side of my car when IT IS UNDER LOAD and past 3000 rpms. i'm thinking i have a exhaust leak somewhere.
i'm going to the track tommorow and i'm using the giggle gas. i hope nothing goes wrong,,
