This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and thus not compensated for and can lean the engine out and can as well as permit the engine to rev stirring in imitation of not desired causing aggressive running. As its a mechanical deformity it tends not to aim upon the malfunction roomy and you can sometimes hear a hissing noise later 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 accomplish a quick fault locate if you unplug the meter and rule the engine without it. if the engine condition is the similar subsequently chances are the meter or the membership to it is faulty. Its with worth cleaning the MAF sensor wires, as they can get coated bearing in mind dirt higher than time which later offsets the reading. Use some contact cleaner or brake cleaner to spray can onto the wires to surgically remove the dirt upon no account lie alongside the wires behind all as they are entirely fragile
next I begin the car, the engine surges occurring amongst 1200 and 2000 rpm urge on and forth. I tainted the IAC and the TPS past no alter in symptoms. I have noticed that several Lexus SC’s have this similar issue. Prior to this I would have to get used to the idle quickness screw to demean the rpm and it would withhold for a while. Now, the engine is for ever and a day surging to the reduction where I cannot drive it for unease of damage to the drive train. Any experienced solution?
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