Hello, I have repaired over 30000 vehicles in my career and I dependence to ask you questions past I am not there in person to collect facts, data, or to test your vehicle. I may ask you to accomplishment study in my stead. If breakdown is needed and you would rather not produce a result 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 sick pump will all result in insufficient fuel innate delivered to the engine. Might afterward be worth cleaning out the idle keenness run motor / valve as these get clogged happening similar to carbon and some brake cleaner washed through helps forgive things off.
This could be a large vacuum leak ,with the MAF joined it is isolated measuring the air that is getting similar to the MAF, therefore if the intake manifold is sucking in ventilate the let breathe to fuel ratio will be totally out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. afterward carb cleaner spray can spray can in the place of the hissing in the manner of the engine running and considering you listen the engine stall or rev forward-looking there is the leak ,could be a bad vacuum hose bad gasket on the manifold.