Ok here it goes, i had the cat removed and now my check engine light comes on. I have the fingerstick on there but the check engine light still comes on, it looks to be installed right! I had some one scan it but they just deleted the code but had said something about the maf sensor. My truck doesnt run good. Its a 05 C.A truck i understand about the C.A law but people have said that they have no problem with there truck. if anyone has some advise on how to fix this beside to put the cat back on that would help out alot. It sounds to clean with out the cat i dont want it back on.