Hi Mika
There are many different foetidas. Generally the fruit are edible and indeed very tasty but I would strongly advise that you do not try to do anything with the leaves. Many Passiflora are cyanogenic so stick with commercially available P. incarnata.
Myles

Here is a link that might be useful: Passiflora toxicology

Thank you for the link.It was helpful.I ordered my foetidas from Georgiavines online and the info said that it was found in the galopagas(can't spell).I would love to start a collection of different species of passiflora.I guess my next one will be incarnata.thank you.