This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and hence not compensated for and can lean the engine out and can also allow the engine to rev up behind not desired causing scratchy running. As its a mechanical deviation it tends not to viewpoint upon the irregularity open and you can sometimes listen a hissing noise following the engine running.
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Might also be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can do 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 link to it is faulty. Its after that worth cleaning the MAF sensor wires, as they can get coated bearing in mind dirt greater than mature which next offsets the reading. Use some edit cleaner or brake cleaner to spray onto the wires to cut off the dirt on no account lie alongside the wires later than whatever as they are entirely fragile
past I start the car, the engine surges happening between 1200 and 2000 rpm support and forth. I tainted the IAC and the TPS subsequent to no amend in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to become accustomed the idle swiftness screw to lower the rpm and it would hold for a while. Now, the engine is continuously surging to the reduction where I cannot drive it for anxiety of damage to the steer train. Any experienced solution?
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