well i fail in both hc and co... n0 is fine.... at 15 mph hc measures 177 and max is 121 and for the c0 it measures 2.89 but max is .76..................................... i replaced plugs, wires, cap, oil, both my o2 sensers... both denso's from napa.. so there not chepos... that did not help one bit at all... so now i threw on a new magnaflow cat.... i checked my charcole canister and it didnt have airflow threw any ports on it.... my stock pcv valve seemed like it was sticking so i got a new one of those.... and my tps may not be adjusted correctly.... my questions is what exactly causes C0? it seems really high.. alot higher than the hc?? could a clogged canister make a big dent on my smog? it had no airflow at all?? also way back then when i was building up my truck some guy told me to adjust the timing and loosen the tps and tap it till the rpms change then tighten it up.... well i dont think that was correct at all... totally screwd up my idle bla bla bla... jumpt up and down at certain rpms... so i adjusted it back to what i thought was correct but im not sure... if my tps is not properly adjusted will it make me fail smog also??
