hi just bought my first 300tdi off road finding it very greedy on fuel and very sluggish, it has 2in lift kit,d44 off road bumpers,winch,33in off road tyres,diff guards, axle breathers,steering guard sump guard, fully poly bushed,rock sliders/dislocation cones,snorkel high level air intake,ali sport uprated intercooler is this the reason for being so slow? i am fitting full de/cat sports exhuast,new fuel pump,egr blanking kit and full service kit, please tell me this will make things better, motorway miles done 250,cost £90.