This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and therefore not compensated for and can lean the engine out and can with allow the engine to rev happening past not desired causing severe running. As its a mechanical anomaly it tends not to approach on the irregularity well-ventilated and you can sometimes listen a hissing noise taking into consideration the engine running.
Might along with be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can do a quick idiosyncrasy locate if you unplug the meter and manage the engine without it. if the engine condition is the thesame then chances are the meter or the association to it is faulty. Its with worth cleaning the MAF sensor wires, as they can get coated in the manner of dirt higher than epoch which later offsets the reading. Use some contact cleaner or brake cleaner to spray onto the wires to sever the dirt on no account be adjacent to the wires in the same way as anything as they are extremely fragile
subsequent to I start the car, the engine surges up with 1200 and 2000 rpm urge on and forth. I distorted the IAC and the TPS similar to no alter in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to acclimatize the idle speed screw to belittle the rpm and it would support for a while. Now, the engine is at all times surging to the narrowing where I cannot drive it for terror of damage to the drive train. Any experienced solution?
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