Hello, I have repaired over 30000 vehicles in my career and I craving to ask you questions before I am not there in person to build up facts, data, or to exam your vehicle. I may ask you to function scrutiny in my stead. If testing is needed and you would rather not bill testing, I can have enough money my best advice, Fuel pressure?
Might along with be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can get a fast idiosyncrasy locate if you unplug the meter and manage the engine without it. if the engine condition is the thesame next chances are the meter or the connection to it is faulty. Its afterward worth cleaning the MAF sensor wires, as they can acquire coated subsequent to dirt on top of grow old which later offsets the reading. Use some gain access to cleaner or brake cleaner to spray onto the wires to surgically remove the dirt upon no account be next to the wires like everything as they are unconditionally fragile
This could be a large vacuum leak ,with the MAF linked it is without help measuring the expose that is getting in imitation of the MAF, in view of that if the intake manifold is sucking in expose the air to fuel ratio will be totally out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. similar to carb cleaner vaporizer spray can in the area of the hissing taking into account the engine dispensation and bearing in mind you hear the engine stall or rev well along there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.