Hello, I have repaired exceeding 30000 vehicles in my career and I habit to ask you questions past I am not there in person to assemble facts, data, or to test your vehicle. I may ask you to do something assay in my stead. If breakdown is needed and you would rather not operate testing, I can have the funds for 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 all result in insufficient fuel mammal delivered to the engine. Might next be worth cleaning out the idle readiness control motor / valve as these acquire clogged going on like carbon and some brake cleaner washed through helps clear things off.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you up 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 going on and is warmed up? oftentimes in engine decree many factors may cause the similar symptom(s)