What do i need to check if the number three cylindar is miss firing. I have ignition coil, spark plugs, fuel filter, air filter. I had and oil change as well.

Serviced where ? If you think that they may have done something to cause this problem ,take it back to them . You need to test thing's before replacing parts . What's missing SPARK or FUEL . Go on youtube check out videos on testing ignition system an fuel systems .

coil,distributor or ignition coil packs that produce proper firing ..but first save some cash and change your fuel filter and also check injectors have a fuel pressure test done at a shop

Have you checked all fuel injectors? Miss fire data is determined by ignition miss. I would also double check that all plug wires are fully seated on plug

Thanks for choosing FixYa and welcome. For a tune up, you would need to change spark plugs, coils, distributor cap, coil pack, and wires. You would change the air filter and the fuel filter also. Change your pcv valve as well. You can also change all your fluids and filters, such as oil, coolant fluid, and transmission fluid.

I would first,change the spark plugs only if they were in the motor,say three years and 50,000. Not just to fix a misfire
Second you can only change a COP Coil, if you have a code or a way of knowing which one is bad. Again,why would you change all of them, when they all now work?
Crank Sensors rarely fail,so what test did you do to determine that was necessary?
Also.how would you know ,you had a missing coil, if you had no crank signal?
Now lets go from where you are now
Did you check fuel pressure,key-on ,eng off,with a pressure gauge?
Fuel filter fairly new?
Do you have all the ducting from the air cleaner to throttle body on and no vacuum leaks?
Do you have the MAF sensor connected. No signal,no start!!

Let me know what help you need

Change the spark plug wire also. This is often looked over but it has most to do with a miss fire then a spark plug 9 times out of 10

I always check compression at wide open throttle...I'm not happy with the two 90's but it should start.
I'm also not happy with variation in spark intensity and wonder what's going on there.
What I'd probably do at this point would be to disconnect the fuel pump harness so no fuel will pump, clear the engine of fuel in the cylinders by disabling coil and spinning the engine over with rags over the plug holes.... Make sure there are no sparks or you will have a fire.
Then, replace the plugs and re-connect coil but not pump and spray carb cleaner into intake while turning it over with the key in the on position so you can regulate the amount of fuel (cleaner) see if you can get it to start to get some heat in it. If it starts, then plug the pump back in.
If it ran before with no problems there isn't any reason it should not now unless something deteriorated.
if you still get nothing, you will need to run tests on each component using a haynes or chilton manual as a guide and a digital multi-meter. Make sure all ground connections are clean, including block ground, firewall ground and both fenders, especially any computer leads connected to ground. It won't hurt to remove each relay and just plug them back in to re-establish contact too. If you find anything strange, ask and I'll try to help with that.

It can be going weak on you. The pressure of the pump will have to be checked to see

I would say replace ignition coil, that might me the problem, otherwise it can be the ecu, which might have some electrical problems not allowing the car to stay running. Good luck.

Go get the codes ran at auto zone or advance auto parts they will do it for free. If the codes come up as a cylinder miss-fire then it is most likely a coil (being a ford). Write down which cylinder it is. I wouldn't replace any of the spark plugs , useless you have more than 100,000 miles. If you have to replace the spark plugs use BOSH double plautim or better. The cylinder placing is ( as your are looking at the front of the truck) passenger side front to back 1-2-3-4 driving side front to back 5-6-7-8. If you never seen a coil buy one so you know what you are looking for. The coil is held in by a 7mm bolt. Take the bolt out and replace the coil. Problem Solved. Estimated time 20 Mins with 60 dollars per coil.