Ford: Ford Country Squire Ltd Station Wagon 5.0, ford country squire, throttle position sensor

Question
The engine idles roughly and has no mid-range power and will fall on its face if you open the throttle all the way. Have changed oxygen sensors and throttle position sensor. The year is a 1988 Ford Country Squire Ltd with a 5.0 fuel injected engine. What do you recommend the next step to take or what else should we check?

Answer
There are two possibles either you idle solinoid went out or You have clogged and dirty fuel injectors which aren't allowing gas to the cylindars and full throttle because there is something blocking the gasolines way.  I recommend running some fuel injector cleaner and then see how she runs.