This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and as a result not compensated for and can thin the engine out and can as well as permit the engine to rev occurring once not desired causing severe running. As its a mechanical malformation it tends not to point of view upon the defect well-ventilated and you can sometimes hear a hissing noise like 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 reach a quick defect find if you unplug the meter and run the engine without it. if the engine condition is the same then chances are the meter or the association to it is faulty. Its as well as worth cleaning the MAF sensor wires, as they can acquire coated like dirt exceeding epoch which then offsets the reading. Use some entry cleaner or brake cleaner to vaporizer onto the wires to surgically remove the dirt upon no account adjoin the wires following all as they are agreed fragile
taking into consideration I begin the car, the engine surges up amongst 1200 and 2000 rpm encourage and forth. I misused the IAC and the TPS similar to no correct in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to get used to the idle enthusiasm screw to humiliate the rpm and it would retain for a while. Now, the engine is until the end of time surging to the reduction where I cannot drive it for panic of damage to the steer train. Any experienced solution?