Dear all, i had swapped my Honda City 2005 1.2L engine from 1.5L and didn't replaced the ECU. My car was running good at start, and it was throwing water from exhaust but know it emits such gas which burns nose and eyes and while sitting in the car, I feel a sort of dum dum ... I have shown this to alot of mechanics they only does tunning nothing else. Please help me out.