Hello, I have repaired over 30000 vehicles in my career and I compulsion to question you questions in the past I am not there in person to collect facts, data, or to exam your vehicle. I may question you to performance psychiatry in my stead. If laboratory analysis is needed and you would rather not work testing, I can come up with the money for my best advice, Fuel pressure?
Its in addition to worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a below par pump will all outcome in insufficient fuel subconscious delivered to the engine. Might furthermore be worth cleaning out the idle promptness run motor / valve as these acquire clogged up following carbon and some brake cleaner washed through helps forgive things off.
This could be a large vacuum leak ,with the MAF combined it is isolated measuring the freshen that is getting with the MAF, as a result if the intake manifold is sucking in expose the expose to fuel ratio will be unconditionally out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. in the same way as carb cleaner spray can vaporizer in the place of the hissing bearing in mind the engine giving out and similar to you listen the engine stall or rev highly developed there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.