need advice
 

hey just need help i have an 02 liberty rx2.5 and when the car is cold it takes a while to start it has to crank for 10 secs till it starts it only does this of a cold start. but if u turn the key and let it crank for half a second then stop and then then it will start perfectly. i have no idea i think a sensor is playin trick and help will be greatly appreciated.