Hello, I have repaired higher than 30000 vehicles in my career and I craving to ask you questions previously I am not there in person to gather facts, data, or to test your vehicle. I may question you to undertaking chemical analysis in my stead. If testing is needed and you would rather not function testing, I can present my best advice, Fuel pressure?
Might also be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can pull off a quick aberration locate if you unplug the meter and direct the engine without it. if the engine condition is the same next chances are the meter or the link to it is faulty. Its furthermore worth cleaning the MAF sensor wires, as they can acquire coated like dirt higher than become old which subsequently offsets the reading. Use some entrance cleaner or brake cleaner to spray onto the wires to surgically remove the dirt upon no account adjoin the wires later everything as they are completely fragile
This could be a large vacuum leak ,with the MAF connected it is unaccompanied measuring the let breathe that is getting taking into consideration the MAF, correspondingly if the intake manifold is sucking in let breathe the expose 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. once carb cleaner spray spray in the area of the hissing afterward the engine government and following you listen the engine stall or rev sophisticated there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.