truck will not stay running

Check and test the idle air control motor, also clean the EGR valve and test the throttle position sensor-

found out what the problem was, the battery was losing power. had the battery tested and it was way below what it should be. found out it was an old army battery, it has been on the truck longer than we have had it. 10 to 12 years. after we replaced battery it worked perfectly for about a week, now truck will crank but will not start.

Cranks but no start condition:

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine at least 3/16 away from ground -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem,Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if so, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it