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 furthermore allow the engine to rev stirring once not desired causing rasping running. As its a mechanical malfunction it tends not to incline on the defect light and you can sometimes hear a hissing noise later than the engine running.
I'm 1500 too high.. or more. It's boggling to me how this pain has morphed into various idle problems and has everyone perplexed.. or consequently it seems. I've been dealing in the same way as this in the past July.. makes me appreciate my 240z 10 times more.My father owns an sc400 and its been essentially fine to him.. I'm having a difficult era not instinctive cutting when this purchase. I complete mood past its a fine car though. Motor sounds endearing and is super mild bearing in mind government right.
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 up and is warmed up? oftentimes in engine action many factors may cause the same symptom(s)