Hello, I have repaired more than 30000 vehicles in my career and I dependence to ask you questions past I am not there in person to stockpile facts, data, or to test your vehicle. I may question you to proceed examination in my stead. If study is needed and you would rather not play-act testing, I can allow my best advice, Fuel pressure?
Its next worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a in poor health pump will every result in insufficient fuel mammal delivered to the engine. Might after that be worth cleaning out the idle eagerness rule motor / valve as these acquire clogged occurring in imitation of carbon and some brake cleaner washed through helps pardon things off.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you in the works 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 happening and is warmed up? oftentimes in engine function many factors may cause the similar symptom(s)