I have a 2007 civic si 2dr with a short ram k&n a decide to buy my self a flashpro so i reflash my ecu with the k&n basemap my car was running well except datalogue with knock so i decide to put back to stock ecu. There the problem the car run well except 2 time i got a big lagg in 2 and 4 gear after a hard acceleration 1-2 i feel like the car was in 6 gear or the car stop no sound at all the rpm was not moving from 5000rpm that last about 2 second each time help please
Im french sorry for the bad english