This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and hence not compensated for and can thin the engine out and can also allow the engine to rev up as soon as not desired causing prickly running. As its a mechanical defect it tends not to position on the defect lively and you can sometimes hear a hissing noise afterward 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 practically the pain history. It currently has a master tech approved idle expose rule valve and tps installed. without touching anything, the last (used) ecu and my original, would manage in the car without this symptom.
I'm reviewing your ask now, and will post put up to similar to your answer ASAP. Rgds Greg. What deformity codes complete you have. Does the engine govern once the MAF disconnected. once the loud hissing unassailable this could be your problem. This could be a large vacuum leak ,with the MAF united it is lonely measuring the let breathe that is getting with the MAF, hence if the intake manifold is sucking in let breathe the let breathe to fuel ratio will be completely out and cause the engine to stal