Hello Guys,
We have a 2018 Camaro SS that we just installed a catback. The back valves are still in place but outside exhaust pipes. Of course the car trows an error code. With VCM editor we tried many things like DoD disable, DTC disable, Stage1 tune, but on all cases at 60-80 mph with very little throttle the car seems to disengage and then engage trans, I see by cluster rpm oscilating 200rpm or so. Seems that something related to DoD .
Attached a log... at RPM line you can see some "spikes" .
Camaro C6 SS 6 v2 roadway error 2.hpl
Any help much apreciated