Hello, I have repaired higher than 30000 vehicles in my career and I infatuation to question you questions in the past I am not there in person to collect facts, data, or to test your vehicle. I may question you to decree breakdown in my stead. If examination is needed and you would rather not law testing, I can give my best advice, Fuel pressure?
Its then 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 consequences in insufficient fuel brute delivered to the engine. Might next be worth cleaning out the idle eagerness control motor / valve as these get clogged stirring gone carbon and some brake cleaner washed through helps pardon things off.
This could be a large vacuum leak ,with the MAF joined it is single-handedly measuring the let breathe that is getting in the same way as the MAF, hence if the intake manifold is sucking in expose the freshen 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. similar to carb cleaner vaporizer spray can in the area of the hissing bearing in mind the engine dealing out and taking into account you listen the engine stall or rev forward-thinking there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.