This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and therefore not compensated for and can thin the engine out and can as well as permit the engine to rev stirring subsequently not desired causing coarse running. As its a mechanical deviation it tends not to viewpoint on the malfunction light and you can sometimes listen a hissing noise in the same way as 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. subsequently I unplug it and manage the motor, the car runs coarse and at 850ish. I can and no-one else guess that my additional rebuilt ecu has an issue, or the tps needs to be re-adjusted, or somehow my maf has died in the midst of all this. I don't think the tps has that much govern in the oscillate of rpm though? I think it lonesome adjusts it going on for 1k..
in imitation of I start the car, the engine surges stirring surrounded by 1200 and 2000 rpm encourage and forth. I misused the IAC and the TPS later no tweak in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to acclimatize the idle zeal screw to humiliate the rpm and it would keep for a while. Now, the engine is all the time surging to the narrowing where I cannot steer it for agitation of damage to the drive train. Any experienced solution?
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