This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and appropriately not compensated for and can lean the engine out and can moreover permit the engine to rev going on following not desired causing rude running. As its a mechanical oddity it tends not to viewpoint upon the deviation roomy and you can sometimes hear a hissing noise bearing in mind the engine running.
I did re-check them tho. The master tech did extensive tests on the expose flow meter and said it was good. considering I unplug it and run the motor, the car runs rough and at 850ish. I can deserted guess that my extra rebuilt ecu has an issue, or the tps needs to be re-adjusted, or anyhow my maf has died in the midst of every this. I don't think the tps has that much govern in the every other of rpm though? I think it deserted adjusts it in relation to 1k..
as soon as I begin the car, the engine surges going on between 1200 and 2000 rpm put up to and forth. I changed the IAC and the TPS next no fine-tune in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to adapt the idle quickness screw to lower the rpm and it would sustain for a while. Now, the engine is continuously surging to the tapering off where I cannot drive it for distress of damage to the steer train. Any experienced solution?