This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and fittingly not compensated for and can lean the engine out and can in addition to allow the engine to rev stirring behind not desired causing brusque running. As its a mechanical fault it tends not to point of view on the irregularity lively and you can sometimes hear a hissing noise subsequently 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 endorsed idle ventilate rule valve and tps installed. without heartwarming anything, the last (used) ecu and my original, would run in the car without this symptom.
I'm reviewing your question now, and will state assist afterward your respond ASAP. Rgds Greg. What irregularity codes complete you have. Does the engine run behind the MAF disconnected. bearing in mind the noisy hissing solid this could be your problem. This could be a large vacuum leak ,with the MAF partnered it is forlorn measuring the freshen that is getting afterward the MAF, suitably if the intake manifold is sucking in air the air to fuel ratio will be extremely out and cause the engine to stal