what causes my truck to lose power and start to air pocket.

What is your question?

u turn on the vehicle put it in drive, about a mile into driving it starts to lose power and u have to slowly release gas peddle until it catches speed, but as soon as u try to push in gas alittle more, speed goes down and starts to air pocket and seems like it is choking. i was told it could be a sensor, but wouldnt know which one.