I would start by checking spark and gas. Make sure your plug boots and coil wire boots are seated all the way on the plug and on the cap. Crank the engine over for a few seconds and pull a plug and see if it is wet with gas. If it has gas on it, wipe it off and put the plug wire on it and ground the plug and have someone crank it over and see if it sparks. Yellow orange spark is weak, blue white spark is strong. I have seen before where truck had spark but it was very weak and did not run. Also make sure all electrical connections are tight. Make sure there is gas in the truck. I have seen before a guy tried for 3 hours to get a car running. I asked if he had gas, he said yes, it turned out his gas gauge was broken. You never know. It has to be something simple.