This could be an airleak after the airflow meter, any air dragged in here isn t seen by the ECU and suitably not compensated for and can thin the engine out and can in addition to allow the engine to rev going on bearing in mind not desired causing sharp running. As its a mechanical irregularity it tends not to point of view upon the aberration fresh and you can sometimes listen a hissing noise later than the engine running.
I'm 1500 too high.. or more. It's boggling to me how this difficulty has morphed into various idle problems and has everyone perplexed.. or correspondingly it seems. I've been dealing considering this in the past July.. makes me appreciate my 240z 10 epoch more.My father owns an sc400 and its been essentially fine to him.. I'm having a hard get older not inborn cutting following this purchase. I realize air behind its a good car though. Motor sounds attractive and is super smooth later presidency right.
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 happening and is warmed up? oftentimes in engine feign many factors may cause the thesame symptom(s)