they seem to be comming from where the petrol tank is.... ive done an air fuel ratio and got the carbies tuned and changed the fuel cap....

yeah i get that as wel on hot days with a full tank. I cant findwhere the problem is either. ??

You will need to design and install a "breather" system like the sedans have.

I don't have a Ute, so I can't say for certain, but the parts books seem to indicate that there is only a breather for filling. Both of these breather pipes are near the neck of the filler.

Sedans have 2 breathers, one 5/8 pipe for filling and a 1/4 inch pipe for operation breathing. This is the tubing that "snake" around under the parcel shelf (behind the back seat). The pipe then pushed down through a hole in the floor to vent to atmosphere.

Now that we know it's not the other things we discussed before, then it's either a leak in the fillerneck, or the bad design of the Ute breathers.

Chris