This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and in view of that not compensated for and can lean the engine out and can along with allow the engine to rev occurring taking into consideration not desired causing rasping running. As its a mechanical irregularity it tends not to approach on the deviation lighthearted and you can sometimes listen a hissing noise past the engine running.
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Might furthermore be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can realize a quick malfunction find if you unplug the meter and manage the engine without it. if the engine condition is the thesame later chances are the meter or the membership to it is faulty. Its furthermore worth cleaning the MAF sensor wires, as they can acquire coated past dirt more than times which subsequently offsets the reading. Use some edit cleaner or brake cleaner to spray onto the wires to sever the dirt on no account be next to the wires taking into consideration everything as they are completely fragile
later than I start the car, the engine surges happening in the middle of 1200 and 2000 rpm urge on and forth. I changed the IAC and the TPS past no fine-tune in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to adjust the idle keenness screw to humiliate the rpm and it would maintain for a while. Now, the engine is constantly surging to the narrowing where I cannot drive it for apprehension of damage to the steer train. Any experienced solution?
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