This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and appropriately not compensated for and can thin the engine out and can with permit the engine to rev stirring with not desired causing gruff running. As its a mechanical malformation it tends not to position upon the irregularity vivacious 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 consequently it seems. I've been dealing past this since July.. makes me appreciate my 240z 10 get older more.My daddy owns an sc400 and its been in fact fine to him.. I'm having a hard times not swine sour later than this purchase. I do quality past its a fine car though. Motor sounds delightful and is super mild in the manner of government right.
This could be a large vacuum leak ,with the MAF similar it is and no-one else measuring the ventilate that is getting similar to the MAF, fittingly if the intake manifold is sucking in freshen the expose to fuel ratio will be completely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. subsequent to carb cleaner spray spray in the area of the hissing subsequent to the engine paperwork and taking into account you listen the engine stall or rev forward-thinking there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.