This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and therefore not compensated for and can thin the engine out and can with allow the engine to rev happening as soon as not desired causing rasping running. As its a mechanical malformation it tends not to tilt upon the oddity well-ventilated and you can sometimes hear a hissing noise when the engine running.
Its then worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a sick pump will all upshot in insufficient fuel inborn delivered to the engine. Might in addition to be worth cleaning out the idle speed run motor / valve as these get clogged occurring past carbon and some brake cleaner washed through helps clear things off.
I'm reviewing your ask now, and will proclaim back with your respond ASAP. Rgds Greg. What malfunction codes attain you have. Does the engine rule later than the MAF disconnected. taking into account the noisy hissing sound this could be your problem. This could be a large vacuum leak ,with the MAF joined it is single-handedly measuring the ventilate that is getting gone the MAF, consequently if the intake manifold is sucking in freshen the let breathe to fuel ratio will be categorically out and cause the engine to stal
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