This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and as a result not compensated for and can thin the engine out and can after that allow the engine to rev in the works next not desired causing aggressive running. As its a mechanical irregularity it tends not to point upon the irregularity vivacious and you can sometimes listen a hissing noise taking into account the engine running.
Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me say you a tiny more more or less the hardship history. It currently has a master tech endorsed idle expose manage valve and tps installed. without disturbing anything, the last (used) ecu and my original, would rule in the car without this symptom.
This could be a large vacuum leak ,with the MAF partnered it is on your own measuring the freshen that is getting once the MAF, consequently if the intake manifold is sucking in freshen the air to fuel ratio will be agreed 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 can spray in the area of the hissing as soon as the engine management and considering you listen the engine stall or rev difficult there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.