Hello, I have repaired exceeding 30000 vehicles in my career and I obsession to question you questions before I am not there in person to assemble facts, data, or to exam your vehicle. I may ask you to achievement assay in my stead. If psychiatry is needed and you would rather not produce a result testing, I can meet the expense of 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 poorly pump will every outcome in insufficient fuel innate delivered to the engine. Might moreover be worth cleaning out the idle eagerness control motor / valve as these get clogged up once carbon and some brake cleaner washed through helps release things off.
This could be a large vacuum leak ,with the MAF similar it is unaided measuring the ventilate that is getting when the MAF, so if the intake manifold is sucking in let breathe the let breathe 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. later carb cleaner vaporizer spray in the place of the hissing subsequently the engine management and next you hear the engine stall or rev innovative there is the leak ,could be a bad vacuum hose bad gasket on the manifold.