Having trouble clearing this check engine light. last time I went through emissions I replaced the drivers side catalytic converter, all 4 O2 sensors, secondary air pump and SAP relay. Damn car passes emissions but as soon as I left the light came back on. Now it is emissions time again. I removed the combi valve on the passenger side and cleaned out a lot of carbon build up hoping that would help, also try to check for leaks using a homemade smoke machine but didn't really see anything. thing I don't understand, I was getting P1176 and P1177 after I cleaned the Combi valves and cleared. then I got P1411 and P1423, thinking it was just a fluke, I rest to see what comes up. Now I get P1176 and P1177 again, WTF... anyone ever had this problem? could it be the computer? I know a lot of people are saying the hoses leak but didn't see any hoses smoking... should I replace anyway since its cheap fix and which ones are likely the ones causing this problem? Thanks for any help in advance...