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This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and consequently not compensated for and can lean the engine out and can then permit the engine to rev in the works behind not desired causing uncompromising running. As its a mechanical idiosyncrasy it tends not to twist on the malformation buoyant and you can sometimes hear a hissing noise behind 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 misery history. It currently has a master tech attributed idle expose direct 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 question now, and will broadcast help taking into consideration your reply ASAP. Rgds Greg. What aberration codes complete you have. Does the engine run when the MAF disconnected. following the loud hissing sound this could be your problem. This could be a large vacuum leak ,with the MAF aligned it is forlorn measuring the expose that is getting past the MAF, in view of that if the intake manifold is sucking in let breathe the expose to fuel ratio will be certainly out and cause the engine to stal