KJ feels like binding when evey thing heat up.

[Bama KJ]

Need info or some kind of idea what is going on. Just added GD computer and works fine but one week later feels like the motor is having to work harder than before and the gas mileage is still the same.Acts like the drive train is in a bind or the brakes are draging bad. Checked the brakes and no adnormal heat on them.

Some body got any answers.