I have a 03 accord ex recently did an engine swap to a 05 3.0 VTEC. Engine ran great for around 2 weeks after the swap. now i have a very irractic idle and wont rev up over 3000rpm. it is also backfiring through the intake, no brakes, and has shut off my TCS. It has done it once before but i just turned the car off and when i restarted the car it went away. Now it has done it again and wont go away. Any thoughts?????