Engine is 1.0 EcoBoost. When accelerating at part throttle it sputters. Over half throttle it's fine. Also sometimes when I'm in gear and off throttle it acts as if I'm pushing the gas pedal, It jerks forward. I replaced the MAF sensor and no fix. Any suggestions? Check engine light came on then off. Waiting for it to come on again so I can read the code. Throttle body maybe?