Describe your problem...starting the car it will idle smooth 4 bout 10 secs then idle drops and wants 2die.it wil idle low and rough after while it will start hi-rev,choke wil open and gauge will go up.but wen i drive it wil jerk up2 5mins.evens if the car stands 4 halfhour after driving,it will evens start up more harder then a cold day