So my HFC's blew out when I installed them, probably due to the ECU freaking out and changing the mixture (my guess). So my concern now is, since I am replacing them with resonators and going catless, if my mixture is dangerously off enough to blow cats, it should probably be fixed soon. What are my options, all I want is an AFR correction, I dont need anything else done. Eventually I want to buy the EManage Ultimate, but not now. Can I take it to a shop and have them tune it without buying anything? Thanks.