So i bought an 02 Z28 the other day and am already pulling some codes....

3 total:

1,2 were both knock sensor codes (prob. cause they installed roller rockers, an might not be the best setup), so i am saving for a crane cams kit for rollers, rockers, cam, etc....

3rd code was a P0418, secondary air injection malfunction relay

i was told that code is more then likely cause they installed hooker long tube headers that didnt have the AIR provisions......and that if I had access to a power programmer i could delete that code....