This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and for that reason not compensated for and can thin the engine out and can as a consequence permit the engine to rev taking place later than not desired causing sharp running. As its a mechanical fault it tends not to face upon the anomaly fresh and you can sometimes hear a hissing noise once the engine running.
Might plus be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can realize a fast malfunction locate if you unplug the meter and rule the engine without it. if the engine condition is the similar later chances are the meter or the link to it is faulty. Its in addition to worth cleaning the MAF sensor wires, as they can get coated behind dirt beyond period which after that offsets the reading. Use some open cleaner or brake cleaner to spray can onto the wires to surgically remove the dirt upon no account lie alongside the wires subsequently everything as they are entirely fragile
as soon as I start the car, the engine surges taking place surrounded by 1200 and 2000 rpm back and forth. I tainted the IAC and the TPS as soon as no fine-tune in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to familiarize the idle readiness screw to subjugate the rpm and it would support for a while. Now, the engine is constantly surging to the tapering off where I cannot steer it for distress of broken to the drive train. Any experienced solution?