I have a Malone stage 1.5 tune and the flashzilla. I was wondering if anyone knows if any trace is left on the ecm after you put the stock tune back on. California recently changed the software for the smog in hopes of catching if you have had your car tuned. I have an 01 Cummins that used to have a box tuner that plugged into my map and data link connector and despite not having issues at the last inspection, it just failed due to presence of tampering in the ecm. Should I be fine with the Jetta since it is a flash rather than a box tuner