I drove my Durango here from Texas and it is running slow, like it is having a hard time going when I press on the gas. Is it the difference in the gas and is there something I can do to make it run normal again?
First you have to determine the cause. Brakes can be dragging and getting real hot. You would feel that by standing next to one of the front wheels. Parking brake cable could be rusted in the partially-applied position. You'd feel that by one of the rear wheels. Could have an engine misfire. You'd feel the engine shaking. Could have a plugged catalytic converter. You'd hear that at the tail pipe as a weird hiss instead of the normal exhaust rumble. The common thing is someone is going to have make some observations before we can figure out the cause and remedy.