Check the hose clips for tightness and examine the trunking for any cracks or splits and as well as every the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best pretentiousness to locate a leak is to have the engine dispensation and warm and subsequently spray lighter gas /propane or brake cleaner in this area each joint in turn. If the engine rev s happening you ve found your leak.
Might also be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can accomplish a fast anomaly locate if you unplug the meter and govern the engine without it. if the engine condition is the same subsequently chances are the meter or the connection to it is faulty. Its next worth cleaning the MAF sensor wires, as they can acquire coated with dirt higher than become old which then offsets the reading. Use some entre cleaner or brake cleaner to spray can onto the wires to surgically remove the dirt on no account lie alongside the wires in the manner of anything as they are totally fragile
I'm reviewing your ask now, and will say assist considering your respond ASAP. Rgds Greg. What deformity codes realize you have. Does the engine run like the MAF disconnected. gone the noisy hissing sealed this could be your problem. This could be a large vacuum leak ,with the MAF partnered it is and no-one else measuring the air that is getting bearing in mind the MAF, in view of that if the intake manifold is sucking in expose the air to fuel ratio will be no question out and cause the engine to stal