My truck is running like ass. It seems too be running very rich. I found a and fixed a vacuum leak going to the map sensor and now it will not idle on its own. the spark plugs were really dark so i cleaned them and tested them . I have spark at all the cylinders. the timing is good and at Wide open throttle the engine starts to die.

would a leaky injector leak fuel with the engine off?

things I have replaced:
IAC valve
Fuel pressure regulator
Coolant Temp Sensor
the 02 sensor is fairly new about 5 months old

any suggestions?