My 2002 Dodge Ram Truck starts intermittently, seems to be fuel related

My truck has been well maintained and only has 71,000 miles on it. When I turn the key the truck will usually fire right up. However, just lately and only on occasion it will turn over fine but will not fire, unless I hold the gas down 1 time and then it fires as I release the gas pedal. For a short time, a check engine light came on but then when out. I did have it checked at Advanced Auto and got the OBD codes P0304 (Cylinder 4 Misfire Detected), P0868 (Transmission Fluid Pressure Low) and P0867 (Transmission Fluid Pressure). I am not sure if any or all of these have anything to do with the starting problem. The check engine light was only on for 2 days then went off, which surprised me because the guy at Advanced Auto that did the OBD code test told me it was a hard code and would stay on until the problem was fixed. The check engine light is still off but the starting problem continues and is becoming more frequent; meaning, I have to hold the gas all the way down to get it to fire as I release the gas pedal. It is now sometimes taking longer to actually fire and I have had it just crank until the battery gets too low to turn it over. Thanks for any help you might be able to provide.