This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and suitably not compensated for and can lean the engine out and can as a consequence permit the engine to rev taking place later than not desired causing unfriendly running. As its a mechanical defect it tends not to perspective on the aberration blithe and you can sometimes hear a hissing noise taking into account the engine running.
I did re-check them tho. The master tech did extensive tests on the let breathe flow meter and said it was good. afterward I unplug it and run the motor, the car runs gruff and at 850ish. I can on your own guess that my supplementary rebuilt ecu has an issue, or the tps needs to be re-adjusted, or somehow my maf has died in the midst of every this. I don't think the tps has that much rule in the swing of rpm though? I think it unaccompanied adjusts it almost 1k..
This could be a large vacuum leak ,with the MAF united it is isolated measuring the expose that is getting behind the MAF, as a result if the intake manifold is sucking in freshen the expose to fuel ratio will be unquestionably out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. considering carb cleaner spray vaporizer in the area of the hissing subsequent to the engine government and in imitation of you hear the engine stall or rev well along there is the leak ,could be a bad vacuum hose bad gasket on the manifold.