Ford Repair Questions? Ask a Mechanic for Answers ASAP
What model 2011 Ford are you working on?
Have you personally checked the oil level in the engine?
Can you keep it running with your foot on the gas pedal?
You could have a dirty throttle body. Try this and see if the problem is still present. Clean the throttle body out with a throttle body spray cleaner that any auto parts store sells. Do this with the key off and the engine off.