Can CAI cause a cylinder to misfire? i wouldnt think so but honestly i dont know much about the electronics of a car and how cai would effect it. I have an autotap and have been getting a CEL for a long time. as soon as i get my car back (getting a bodykit put on right now) im going to scan it and see if i get the code for cylinder misfire. if i do then i shouldnt have to take off my CAI to get the new ECU and injectors. I asked this in another thread and got a good response but now i need to know more about AEM CAI and cylinder misfiring. thanks.