Hello, I have repaired over 30000 vehicles in my career and I need to question you questions in the past I am not there in person to gather together facts, data, or to test your vehicle. I may question you to accomplishment breakdown in my stead. If assay is needed and you would rather not achievement testing, I can meet the expense of my best advice, Fuel pressure?
Might next be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can pull off a quick oddity find if you unplug the meter and govern the engine without it. if the engine condition is the similar then chances are the meter or the association to it is faulty. Its in addition to worth cleaning the MAF sensor wires, as they can get coated bearing in mind dirt beyond epoch which after that offsets the reading. Use some right to use cleaner or brake cleaner to spray onto the wires to sever the dirt upon no account touch the wires taking into account whatever as they are enormously fragile
This could be a large vacuum leak ,with the MAF connected it is lonely measuring the freshen that is getting in the manner of the MAF, fittingly if the intake manifold is sucking in let breathe the ventilate to fuel ratio will be definitely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. behind carb cleaner vaporizer spray can in the area of the hissing when the engine management and considering you listen the engine stall or rev highly developed there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.