This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and hence not compensated for and can lean the engine out and can moreover permit the engine to rev up later not desired causing severe running. As its a mechanical fault it tends not to viewpoint on the irregularity lighthearted and you can sometimes hear a hissing noise when the engine running.
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Its furthermore worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a ill pump will all result in insufficient fuel being delivered to the engine. Might next be worth cleaning out the idle enthusiasm manage motor / valve as these acquire clogged in the works once carbon and some brake cleaner washed through helps pardon things off.
I'm reviewing your question now, and will say help subsequent to your answer ASAP. Rgds Greg. What deviation codes attain you have. Does the engine govern similar to the MAF disconnected. considering the loud hissing hermetic this could be your problem. This could be a large vacuum leak ,with the MAF combined it is lonesome measuring the ventilate that is getting considering the MAF, therefore if the intake manifold is sucking in air the air to fuel ratio will be certainly out and cause the engine to stal
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