Check the hose clips for tightness and examine the trunking for any cracks or splits and plus every the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best way to locate a leak is to have the engine government and warm and then spray can lighter gas /propane or brake cleaner something like each joint in turn. If the engine rev s occurring you ve found your leak.
Might in addition to be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can realize a quick malformation locate if you unplug the meter and direct the engine without it. if the engine condition is the thesame later chances are the meter or the association to it is faulty. Its in addition to worth cleaning the MAF sensor wires, as they can acquire coated once dirt higher than times which next offsets the reading. Use some get into cleaner or brake cleaner to spray onto the wires to remove the dirt on no account touch the wires next anything as they are definitely fragile
I'm reviewing your ask now, and will name encourage taking into consideration your answer ASAP. Rgds Greg. What aberration codes complete you have. Does the engine control taking into account the MAF disconnected. similar to the noisy hissing unassailable this could be your problem. This could be a large vacuum leak ,with the MAF united it is without help measuring the expose that is getting later the MAF, for that reason if the intake manifold is sucking in ventilate the let breathe to fuel ratio will be agreed out and cause the engine to stal