This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and appropriately not compensated for and can thin the engine out and can next permit the engine to rev in the works when not desired causing brusque running. As its a mechanical irregularity it tends not to direction on the irregularity well-ventilated and you can sometimes listen a hissing noise similar to the engine running.
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I did re-check them tho. The master tech did extensive tests upon the let breathe flow meter and said it was good. past I unplug it and rule the motor, the car runs prickly and at 850ish. I can solitary guess that my further rebuilt ecu has an issue, or the tps needs to be re-adjusted, or anyhow my maf has died in the midst of all this. I don't think the tps has that much control in the swing of rpm though? I think it deserted adjusts it on the order of 1k..
like I begin the car, the engine surges happening together with 1200 and 2000 rpm help and forth. I changed the IAC and the TPS behind no tweak in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to become accustomed the idle promptness screw to subjugate the rpm and it would maintain for a while. Now, the engine is at all times surging to the narrowing where I cannot drive it for warning of damage to the drive train. Any experienced solution?
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