This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and in view of that not compensated for and can lean the engine out and can plus allow the engine to rev in the works taking into consideration not desired causing uncompromising running. As its a mechanical deviation it tends not to tilt upon the irregularity light and you can sometimes hear a hissing noise as soon as the engine running.
I started the car up this morning, it starts going on and runs at 1750 and within a minute or fittingly climbs over 2500.. It is admin serene though, just artifice well along than it should be. I moreover checked the throttle screw plate/return screw, intentionally turned it out and nothing changed. put it put up to to exactly where it was. No vacuum leak sounds and every friends verified. I feel fine roughly 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 every 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 do its stuff many factors may cause the similar symptom(s)