Check the hose clips for tightness and examine the trunking for any cracks or splits and then every the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best quirk to locate a leak is to have the engine management and warm and after that spray lighter gas /propane or brake cleaner going on for each joint in turn. If the engine rev s stirring you ve found your leak.
I bought it in July, drove it house from LA (to Utah), and the problems started shortly after I got it home.Any extra back up you can have enough money is appreciated. I don't know what else to do but take it urge on to the dealer. I know I've got the shop foreman operating upon it at the dealer, but I still quality its pushed to the back as its archaic and everyone loses in this situation.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you going on to date on all maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms taking place and is warmed up? oftentimes in engine put it on many factors may cause the same symptom(s)