Hi again my girlfriend has a peugeot 307 1.4 petrol and was asking about possibly tuning her car to get best economy out of it as she does alot of miles .can it be tuned via building maps on laptop of does it require a chip to be installed?

it can be done, but a lot of work for approx. 0.3 litres less on 100km...better to buy a car with 1.6l engine...stronger and you dont need to push him so hard to get the car moving

Have you managed to tune your engine?

the car is maybe a little bit havy for such small engine.