This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and as a result not compensated for and can lean the engine out and can in addition to permit the engine to rev going on in the manner of not desired causing harsh running. As its a mechanical malfunction it tends not to point of view on the deviation lively and you can sometimes listen a hissing noise subsequently the engine running.
I did re-check them tho. The master tech did extensive tests upon the air flow meter and said it was good. as soon as I unplug it and run the motor, the car runs rude and at 850ish. I can isolated 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 govern in the rotate of rpm though? I think it unaided adjusts it around 1k..
This could be a large vacuum leak ,with the MAF united it is solitary measuring the let breathe that is getting behind the MAF, appropriately if the intake manifold is sucking in expose the ventilate to fuel ratio will be extremely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. with carb cleaner vaporizer spray can in the area of the hissing as soon as the engine direction and with you hear the engine stall or rev progressive there is the leak ,could be a bad vacuum hose bad gasket on the manifold.