When car is cold starts hard after car starts it runs smooth

Here's some FYI on your situation. When you turn the switch on, all sensors are activated. One sensor is the cold start switch/temperature sending unit. When working properly, the sensor will send a pulse to the computer telling it to put the engine into cold start mode. Once this is done, a bit more fuel is added to the normal amount to the cylinders and the throttle is advanced slightly making the engine idle a bit faster for the extra fuel coming in. The engine is running to warm-up and the sensor then tells the computer to set the engine back to normal run mode. Once the engine is warm, the sensor is not being used for cold start mode. It will start right up and run smoothly. Now, since your truck is hard to start when cold, first thing you should check is the temperature sending unit wire connection first. if that connection is good, replace the temperature sending unit/sensor, and you'll be good to go. That's a simple repair that must be done when it gets hard to start when cold.

Black smoke is too much fuel. My guess would be that there is an injector that is stuck open draining the pressurized fuel into a cylinder or several cylinders. And that is a considerable amount of fuel. And it would account for the hard start because there isn't any fuel being pumped into the other injectors until the pump builds the pressure back up.

You might want to check the cold start valve, used to add more fuel during cold starts.

Its cold start issues:----

Go through the list of help links mentioned below:----

Click the link :----

Cold start problem and vehicle shudder around 2500 to 3500 rpms

http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

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Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

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Ford explorer 4.0 will not idle when cold?

http://technoanswers.blogspot.in/2012/02/ford-explorer-40-will-not-idle-when.html

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Automatic transmission shift lever hard to move on cold mornings?

http://technoanswers.blogspot.com/2012/01/automatic-transmission-shift-lever-hard.html

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Car won't start when cold?

http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-when-cold.html

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These will help.

Thanks.

Need year/make/model/mileage of vehicle to provide a more specific set of troubleshooting steps.

When was the last tune up? Hard starts when cold are usually caused by fouled spark plugs, worn plug wires, or weak ignition coils. Fuel systems are not as effected by temperature changes as the ignition components.

try to change the coolant temp sensor.

This could be a old/dead/dieing battery. It's easier for a starter to turn a motor that has already warmed up because the motors oil is very smooth at operating temperature. When the vehicle is cold it will be much thicker thus making it much harder for the starter to turn over the motor. Thanks for asking! Try replacing your battery.

Have you checked the fuel pressure regulator for leaks into the intake

tap on the gas a couple of times then try to start it.

well its the handle on the left side you should just pull on it.