Hi i took my car for a rolling road today and it read 170hp and 200 lb/ft of torque at the flywheel. My car has a straight through exhaust with decat, pipercross filter and a superchips uk chip. My car is running very rich at the moment (getting around 10mpg around the town and about 25mpg on the motorway at 70mph) and the tuner didnt manage to eradicate the problem, he seemed to think i need a new lamba sensor which will sort the fueling out.? your help will be much appreciated. thanks.