I own an 01 Insight and am used to 66mpg . I had the battery pack and two control units replaced. Now i can't get over 47mpg in any condition . When driving the car,the battery pack won't charge over 50%. Only when i sit and idle @3,000rpms will the battery charge all the way and then the RPT light comes on,and the cruise won't hold the desired speed yet Regal Honda of Lakeland Fl. says nothing is wrong that everything is working properly . Can somebody tell me how to fix the problem?