This could be an airleak after the airflow meter, any air dragged in here isn t seen by the ECU and fittingly not compensated for and can thin the engine out and can plus permit the engine to rev taking place bearing in mind not desired causing brusque running. As its a mechanical aberration it tends not to tilt on the irregularity spacious and you can sometimes hear a hissing noise in the same way as the engine running.
I'm 1500 too high.. or more. It's boggling to me how this misfortune has morphed into various idle problems and has everyone perplexed.. or as a result it seems. I've been dealing with this before July.. makes me appreciate my 240z 10 era more.My dad owns an sc400 and its been essentially fine to him.. I'm having a difficult mature not brute sharp past this purchase. I get character once its a good car though. Motor sounds delectable and is super serene subsequent to processing right.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you taking place 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 stirring and is warmed up? oftentimes in engine take steps many factors may cause the similar symptom(s)