Thanks Will do the Throtel position sensor wasnt pluged in all the way but was just making contact and the problem has seemed to go away.
Filled the tank up only needed to fill up 20litres so it was 1/2 full
Might be condensation build up in the tank and it gets in at 1/2 way
If it happens again then I will drain the tank.
Thanks for your help dude
Going well for now
Crossed fingers/ Touch wood.
Cheers dude