Check the hose clips for tightness and inspect the trunking for any cracks or splits and along with every the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best mannerism to locate a leak is to have the engine doling out and warm and later vaporizer lighter gas /propane or brake cleaner re each joint in turn. If the engine rev s occurring 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 malfunction find if you unplug the meter and manage the engine without it. if the engine condition is the similar later chances are the meter or the association to it is faulty. Its furthermore worth cleaning the MAF sensor wires, as they can get coated as soon as dirt on top of period which after that offsets the reading. Use some admittance cleaner or brake cleaner to spray onto the wires to cut off the dirt on no account adjoin the wires taking into consideration everything as they are entirely fragile
I'm reviewing your question now, and will pronounce urge on once your reply ASAP. Rgds Greg. What deviation codes realize you have. Does the engine direct once the MAF disconnected. like the noisy hissing hermetically sealed this could be your problem. This could be a large vacuum leak ,with the MAF united it is single-handedly measuring the let breathe that is getting considering the MAF, so if the intake manifold is sucking in expose the freshen to fuel ratio will be entirely out and cause the engine to stal