what is the right tyre pressure for a two year old fiesta?

Go by what the manual tells you. Tyres can be used on many types of vehicles that require a different tyre pressure.

The manual states 29 psi for front, and 28psi for rears with up to 3 people in the car, and about 37psi fully loaded. Always adjust tyre pressures to numbers stated in hand book and not pressure stated on tyre wall.

Go by the manual. The numbers stamped on the tyre are the MAX INFLATION PRESSURES used for seating the tyre when it is fitted.If you go by what is in the manual you can't go wrong

Im sure its down to what type of tyre your using, the pressure should be printed on the tyre itself.

look inside the passengers door, all the tyre pressures are there but if i recall correctly its 26 front and 29 rear

http://www.priamittyres.com/inflation_pressure_cha...

http://www.iwt.co.uk/tyre_pressure.htm

It is recommended to check tyre pressure when tyres are cold.

40 psi ? cant be more than 20..25 max

No, what the car manufacturer says is what you go by. It must be 30PSI when cold, 'cos they will reach 40PSI when warm.

its a ford,then i would say about 4000lbs psi under a crusher.