hi,i just bought a used peugeot 306 1.4 engine wagon model.ive changed the engine,given it a new paint of coat,infact done major repairs and its working well except for two things.one its fuel indicator seems to be misbehaving.even with my tank full,it doesnt give an accurate picture of my fuel gauge.and this means even when i do have fuel,i fill her up to avoid any hassles while driving.can i get some tips on how to correct this anomaly?second,its check engine indicator even after starting the engine doesnt go off.from the manual,it says if this symbol doesnt go off it means there is a fault with either the injector or ignition.ive only changed the fuel pump and im not sure if this is responsible but the fuel pump works ok although it is a tokunbo pump ,i think the type used for one of these six valve engines.any tips would be appreciated.asides these two for now,the car fires well.ive attached a pix of the exact model,petrol engine, of the car.