Replaced the PVC today, as the old one was hanging out of the crankcase cover. No idea when that got broken, but there is a one way valve in there so not sure if this was causing a vac leak or not. On comparison of the two parts the clips which hold the pipe into the cover were snapped off.
Still having a weird intermittent running issue even though its way less than before. Got a diag tool from the web today which gave me quite alot of data, but i have nothing to reference the numbers against, i.e Fuel pressure, MAF at idle etc. If anyone knows good source of info for the 2.8v6 would be appreciated. It seems to run super smooth 80% of the time, and then the other 20 throttle response is lazy. Suspecting it might be cam position sensors, or coils...so more fun to be had.
Also replaced the window motor few days ago, so another thing crossed off the list.