Hello, I have repaired beyond 30000 vehicles in my career and I craving to question you questions before I am not there in person to gather facts, data, or to test your vehicle. I may ask you to work study in my stead. If laboratory analysis is needed and you would rather not be active testing, I can meet the expense of my best advice, Fuel pressure?
I started the car happening this morning, it starts occurring and runs at 1750 and within a minute or for that reason climbs beyond 2500.. It is government smooth though, just way unconventional than it should be. I with checked the throttle screw plate/return screw, intentionally turned it out and nothing changed. put it urge on to exactly where it was. No vacuum leak sounds and all links verified. I environment good virtually them as I've been in there a bunch of times..
This could be a large vacuum leak ,with the MAF united it is unaided measuring the let breathe that is getting gone the MAF, hence if the intake manifold is sucking in freshen the let breathe to fuel ratio will be agreed out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. next carb cleaner spray vaporizer in the place of the hissing gone the engine government and in the same way as you listen the engine stall or rev far along there is the leak ,could be a bad vacuum hose bad gasket on the manifold.