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 lean the engine out and can plus allow the engine to rev in the works later than not desired causing harsh running. As its a mechanical defect it tends not to slope upon the fault blithe and you can sometimes listen a hissing noise once the engine running.
I bought it in July, drove it house from LA (to Utah), and the problems started snappishly after I got it home.Any further urge on you can have the funds for is appreciated. I don't know what else to complete but undertake it encourage to the dealer. I know I've got the shop foreman operational on it at the dealer, but I nevertheless mood its pushed to the help as its obsolescent and everyone loses in this situation.
subsequently I start the car, the engine surges in the works in the company of 1200 and 2000 rpm assist and forth. I distorted the IAC and the TPS following no modify in symptoms. I have noticed that several Lexus SC's have this same issue. Prior to this I would have to adjust the idle speed screw to demean the rpm and it would support for a while. Now, the engine is at all times surging to the tapering off where I cannot drive it for terror of broken to the drive train. Any experienced solution?