97 Honda civic V-Tec

I had a suspension coil replaced at a garage. when I picked up the car he said that he’d noticed my car was slow to pull off but that he sorted it. I hadn’t noticed that but said nothing. Since then my car is running 1rpm higher even at rest and the econo drive is not kicking in. Before he had it, the econo was kicking in all the time and I had great fuel efficiency. Now my car is gobbling up petrol, sounds like its working hard and no econo. Does anyone know What did he do and how can I get it put back the way it was? Thank you!