Hello, I have repaired greater than 30000 vehicles in my career and I need to ask you questions in the past I am not there in person to store up facts, data, or to exam your vehicle. I may ask you to function investigation in my stead. If psychoanalysis is needed and you would rather not achievement testing, I can give my best advice, Fuel pressure?
Might furthermore be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can attain a fast irregularity find if you unplug the meter and run the engine without it. if the engine condition is the same next chances are the meter or the membership to it is faulty. Its moreover worth cleaning the MAF sensor wires, as they can get coated next dirt on top of era which then offsets the reading. Use some contact cleaner or brake cleaner to spray onto the wires to separate the dirt on no account be adjacent to the wires following whatever as they are very fragile
This could be a large vacuum leak ,with the MAF partnered it is unaccompanied measuring the ventilate that is getting in imitation of the MAF, consequently if the intake manifold is sucking in ventilate the air to fuel ratio will be enormously out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. taking into account carb cleaner spray can vaporizer in the area of the hissing bearing in mind the engine direction and behind you hear the engine stall or rev forward-looking there is the leak ,could be a bad vacuum hose bad gasket on the manifold.