hi can anyone tell me how much pressure do i need in the drop off forks as so many people are tellin me diffrent and is it the same amount in both legs ? any help would be great ,, thanks

as said before how heavy are you?what year/model of drop off? and
http://marzocchi.com/spa/mtb/products/airpressure.asp?y=2006&LN=UK&Sito=mtb

erm wen i  got the  bike there was no air in them at all ,, im 13 stone and i use the bike just 4 hammerin about all over relly

i do hope you don't ,mean 5-15 PSI

low pressure marzocchis go up to 15psi. so why does it seem low?

I think they are coil with Air preload. Check by lettign the air our and seing if they still support soem wight, if they do they are coidl and air. Measure the sag with a Zip tie, should be around 25-30%. If you add air enough to get you to that they you shoudl eb set up.