Ford Repair: 1995 Ford Bronco, ford bronco, fan clutch

Question
I have a 1995 Ford Bronco XL with a 5.0 engine. I've had the truck over a year now and have kept up on routine maintenance such as oil changes, tune ups, radiator flushes, cleaning the fuel injectors, ect... I have also replaced the starter, battery, fuel regulator, radiator, and fan clutch since taking ownership of the truck. For the past two months I have been experiencing a problem where the truck will not start at random times. The engine will turn over, there will be no out of the ordinary noises, lights in the vehicle come on, but the truck will not start up. Twenty to thirty minutes later I will try again and the truck will start with no problem. This happens whether I drive the truck a far or short distance or if I have been driving it a lot or letting it sit most the day. I've been noticing it happens on days I get gas up so I assume it’s a problem with the fuel system, but would like to narrow it down. I've taken it to mechanics but they will only do the computer diagnostics check and since the problem happens randomly they never catch it during the diagnostics check. If you can please help me narrow down this problem I would appreciate it very much. Thank you for your time.  

-Matthew

Answer
Matthew, try this... Spray a strater fluid in the intake when this happens.  If the truck start, then it confirm that you may have a problem in the fuel delivery.  I start with cleaning/checking the fuel injectors.  Then reveiw the fueld delivery system as they're maybe a swicth/selnoid that may get stock and cuts-off the fuel.