Hello, I have repaired on top of 30000 vehicles in my career and I habit to question you questions since I am not there in person to assemble facts, data, or to exam your vehicle. I may question you to bill scrutiny in my stead. If testing is needed and you would rather not discharge duty testing, I can offer my best advice, Fuel pressure?
I started the car stirring this morning, it starts happening and runs at 1750 and within a minute or suitably climbs over 2500.. It is doling out mild though, just way well ahead than it should be. I after that checked the throttle screw plate/return screw, with intent turned it out and nothing changed. put it urge on to exactly where it was. No vacuum leak sounds and all links verified. I air fine virtually them as I've been in there a bunch of times..
This could be a large vacuum leak ,with the MAF linked it is without help measuring the air that is getting later the MAF, correspondingly if the intake manifold is sucking in let breathe the air 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. gone carb cleaner vaporizer spray in the area of the hissing bearing in mind the engine management and following you hear the engine stall or rev vanguard there is the leak ,could be a bad vacuum hose bad gasket on the manifold.