Just a thought that may save someone with a manual 8.3 some trouble..After mine failed to start and I knew it was fuel related I started looking.. I found one of the 2 bolts that hold the fuel solenoid completely gone and the other one loose. It left the solenoid a bit wobbly causing it not to work.. 1/2 in wrench fits the bolt head and mine are sae fine thread.. Applied a bit of locktite and should be good now but I will keep check regularly. You can reach the rear bolt easily from outside but the forward bolt is easier dealt with from under the bed.. Just a thought that doesn't take a minute to check but would be more of a problem with a hot engine and on the road.