This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and consequently not compensated for and can thin the engine out and can plus permit the engine to rev happening next not desired causing uncompromising running. As its a mechanical anomaly it tends not to point on the fault lively and you can sometimes hear a hissing noise next the engine running.
I started the car in the works this morning, it starts happening and runs at 1750 and within a minute or in view of that climbs higher than 2500.. It is organization smooth though, just quirk higher than it should be. I as well as checked the throttle screw plate/return screw, with intent turned it out and nothing changed. put it back up to exactly where it was. No vacuum leak sounds and all links verified. I setting fine approximately them as I've been in there a bunch of times..
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you up to date upon all maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms occurring and is warmed up? oftentimes in engine pretense many factors may cause the same symptom(s)