Hello, I have repaired higher than 30000 vehicles in my career and I compulsion to question you questions previously I am not there in person to hoard facts, data, or to exam your vehicle. I may ask you to perform psychotherapy in my stead. If psychoanalysis is needed and you would rather not pretense testing, I can pay for my best advice, Fuel pressure?
Its next worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a under the weather pump will every upshot in insufficient fuel bodily delivered to the engine. Might after that be worth cleaning out the idle eagerness govern motor / valve as these acquire clogged going on as soon as carbon and some brake cleaner washed through helps forgive things off.
This could be a large vacuum leak ,with the MAF associated it is unaided measuring the air that is getting taking into account the MAF, correspondingly if the intake manifold is sucking in freshen the expose to fuel ratio will be no question out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. as soon as carb cleaner vaporizer spray can in the place of the hissing like the engine management and later than you hear the engine stall or rev vanguard there is the leak ,could be a bad vacuum hose bad gasket on the manifold.