Need much more information about the car, age, care it has had. Only 4 things cause hard start. Lack of Air coming into the intake, Lack of Fuel, Lack of spark, Lack of torque from the starter. Assuming the starter is good & battery, and fuel is there, i would check the spark plugs, and spark output. If it has a lot of miles check the Air Filter. The injectors could also be clogged. I always dump 2 bottles of injector cleaner in the tank every 2 months. If you have never done this i would go for 3 bottles. Again the spark cannot be weak, fuel pressure cannot be low, or have restrictions like dirty a fuel filter, or dirty fuel injectors or even bad Gas. And last a computer problem providing incorrect timing to the Injectors or Spark Plugs.
Answers & Comments
Need much more information about the car, age, care it has had. Only 4 things cause hard start. Lack of Air coming into the intake, Lack of Fuel, Lack of spark, Lack of torque from the starter. Assuming the starter is good & battery, and fuel is there, i would check the spark plugs, and spark output. If it has a lot of miles check the Air Filter. The injectors could also be clogged. I always dump 2 bottles of injector cleaner in the tank every 2 months. If you have never done this i would go for 3 bottles. Again the spark cannot be weak, fuel pressure cannot be low, or have restrictions like dirty a fuel filter, or dirty fuel injectors or even bad Gas. And last a computer problem providing incorrect timing to the Injectors or Spark Plugs.