i have a 1979 honda cvcc accord hatchback it is eating up a lot of gas . the car has bin sitting for 9 years i just put it in the shop they rebuilt the carb and got it running good however the MPG is horrible its sucking up too much gas. what do i need to check or what do i need to adjust for the car to get better gas mileage. it also does not have a lot of horse power driving kind of sluggish HELP!