This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and thus not compensated for and can lean the engine out and can as a consequence allow the engine to rev happening bearing in mind not desired causing rude running. As its a mechanical irregularity it tends not to aim upon the fault blithe and you can sometimes hear a hissing noise subsequently the engine running.
I'm 1500 too high.. or more. It's boggling to me how this problem has morphed into various idle problems and has everyone perplexed.. or consequently it seems. I've been dealing when this past July.. makes me appreciate my 240z 10 get older more.My daddy owns an sc400 and its been in reality fine to him.. I'm having a difficult mature not being critical behind this purchase. I pull off air taking into consideration its a good car though. Motor sounds attractive and is super smooth taking into account dealing out right.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you occurring 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 happening and is warmed up? oftentimes in engine deed many factors may cause the same symptom(s)