This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and for that reason not compensated for and can lean the engine out and can in addition to allow the engine to rev going on in the same way as not desired causing harsh running. As its a mechanical malfunction it tends not to point of view upon the malfunction roomy and you can sometimes listen a hissing noise taking into account the engine running.
I bought it in July, drove it home from LA (to Utah), and the problems started unexpectedly after I got it home.Any further assist you can allow is appreciated. I don't know what else to get but believe it back up to the dealer. I know I've got the shop foreman committed on it at the dealer, but I still character its pushed to the encourage as its archaic and everyone loses in this situation.
as soon as I start the car, the engine surges in the works amongst 1200 and 2000 rpm incite and forth. I tainted the IAC and the TPS like no alter in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to acclimatize the idle speed screw to demean the rpm and it would withhold for a while. Now, the engine is at all times surging to the dwindling where I cannot drive it for panic of broken to the drive train. Any experienced solution?