im driving an old waja and i have this two problems all the time..

the signal light not functioning after so many times of repair and the dashboard at the passenger compartment always has hissing sound whenever aircond is turn on.

another problem right now is the heavy vibration when starting the car engine when its still cold.

What is the problem that causing all this and what should i change ? I have change the spark plug and its still vibrating hard and petrol got cut off if i dont press the pedal long enough.

hope you guys can help me

i dont think is the mounting but i try to inspect again. but i knew that if the engine is cold, i have to press the pedal to let the fuel suck in . it s jerking alot.