Around 30mpg around town also had update fitted but engine still "pecks" under load from standing start- any ideasplease?

December 2020 1 75 Report

Around 30mpg around town also had update fitted but engine still "pecks" under load from standing start- any ideasplease?

Cars & Trucks - Hyundai - Accent - 2000 Hyundai Accent

Will need to get it diagnosed. Your description leaves alot to be said.. even so lack of power can be caused by several parts