Having codes p1471 and p1472 03 freelander is really slow any sugestions

The p0300's are misfires. Check your spark plugs, wires, distributor.maybe faulty

some fault codes can only be erased by the use of a scanner as the fix is not recorded temporarily. Fix the problems and then use a scanner..

all these codes have got to do with the in take man variable intake butterfly electrical fault also got variable induction

Google the Codes

That is how you find out
& learn things

The very first thing you do is run an engine control module fault code test.

Maybe this will help (RAVE manual - Rover bible) http://www.landroverresource.com/ FREE download for tons of Rovers up to 2004

When you get that many codes and the drivability issues as well,you most likely have a single item pulling down the computer,so to speak.
You need, as you have done, list what the codes are,possible fixes,based on a trouble chart ,you won't have.
Then you need to do three things.
Have a complete vehicle wiring schematic.
Check what does work
Use logic, and do a few tests of suspected areas, if you don't get what you should,you enter the schematic and work your way back to find out why.

In your case,a very good diagnostic repair shop will be what you want.

high pressure fuel pump under the rear drivers side wheel arch

could be a number of things; cam shaft position sensor, fuel pump, O2 sensors, even VSS (vehicle speed sensor). The code you mention states:

P1471 Land Rover Variable inlet manifold motor 1.Short circuit to V Batt. (vehicle battery?).

P1472 Land Rover Variable inlet manifold motor 2.Short circuit to V Batt.

I suspect it could be an electrical short with one of the sensors. Someone suggested you have your fuel pressure checked.