I have an 06 grand prix, so nothing special, but anyways I now have a ticking sound between 1000-2000 rpm in 4th gear and only 4th gear. I never had this ticking sound before I did a little cleaning. When I say cleaning I mean taking dogbones off and wiping with a rag, putting a cai in, and blew out some dirt in little cracks with air, and changing wire covers. But before I put the cai on I did not hear the ticking sound but after I put it on I can hear it. I dont know if this is false knock or actual knock. Sorry if this is confusing but I am completely lost in solving this problem. thanks for any help.