Style chooser

hi guys,
recently i change my fortuner 2.5g Diesel nozzle and added a "RACE CHIP"..

the car is much more powerful and the top speed increased... BUT

when it reaches 4th gear, i realised black smoke came out from the exhaust (of course lah) but its seems like a Lorry exhaust smoke.... and sometimes when i step on the gas paddle, the engine warning light appears and the whole car langsung cannot move... have to turn off the car and then start back baru can jalan... (this happens...