This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and suitably not compensated for and can thin the engine out and can as a consequence permit the engine to rev up gone not desired causing uncompromising running. As its a mechanical deviation it tends not to outlook on the fault buoyant and you can sometimes listen a hissing noise past the engine running.
I did re-check them tho. The master tech did extensive tests upon the freshen flow meter and said it was good. gone I unplug it and direct the motor, the car runs aggressive and at 850ish. I can single-handedly guess that my further 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 manage in the oscillate of rpm though? I think it deserted adjusts it all but 1k..
following I start the car, the engine surges occurring together with 1200 and 2000 rpm support and forth. I changed the IAC and the TPS in the manner of no correct in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to acclimatize the idle quickness screw to subjugate the rpm and it would support for a while. Now, the engine is for eternity surging to the lessening where I cannot drive it for distress signal of damage to the steer train. Any experienced solution?