Check the hose clips for tightness and examine the trunking for any cracks or splits and in addition to all the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best habit to locate a leak is to have the engine dealing out and hot and subsequently spray can lighter gas /propane or brake cleaner in this area each joint in turn. If the engine rev s in the works 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 get a quick irregularity locate if you unplug the meter and run the engine without it. if the engine condition is the similar later chances are the meter or the link to it is faulty. Its afterward worth cleaning the MAF sensor wires, as they can get coated considering dirt exceeding get older which later offsets the reading. Use some gain access to cleaner or brake cleaner to spray onto the wires to sever the dirt on no account adjoin the wires later whatever as they are completely fragile
I'm reviewing your ask now, and will reveal help later your answer ASAP. Rgds Greg. What malfunction codes attain you have. Does the engine govern later than the MAF disconnected. once the noisy hissing hermetically sealed this could be your problem. This could be a large vacuum leak ,with the MAF related it is on your own measuring the freshen that is getting gone the MAF, therefore if the intake manifold is sucking in ventilate the expose to fuel ratio will be certainly out and cause the engine to stal