hello ... and sorry if my english is way too bad ! not my first language ..
anyway ..

i need your help guys and suggestions .. i just bought fiat uno " made in Brasil " ! for a cheap Price .. " 90 $ us dollars"

... and the problem is .when a push the gas pedal when the car is stop or when am driving there is a misfire and i hear the back fire in the motor .. umm ,, like explosions sound ? ... olso there is a black smoke coming out the exhaust pipe.. little bit of smoke when i push the pedal too hard .. ...
so i went to the mechanic and he told a few things needs to be replaced ..
i replaced the ignition coil ... air filter .. fuel filter .. new spark plugs ..new fuel pump . and one bad injector ..
but till .... same issue .. !


i love this car ... i really do ... and i want it to be fixed properly .. pls help me ...
what should i do next ?