Hello, I have repaired greater than 30000 vehicles in my career and I infatuation to question you questions past I am not there in person to assemble facts, data, or to test your vehicle. I may ask you to produce an effect assay in my stead. If psychoanalysis is needed and you would rather not deed testing, I can present my best advice, Fuel pressure?
I started the car occurring this morning, it starts happening and runs at 1750 and within a minute or thus climbs over 2500.. It is handing out serene though, just artifice innovative than it should be. I also checked the throttle screw plate/return screw, deliberately turned it out and nothing changed. put it encourage to exactly where it was. No vacuum leak sounds and every friends verified. I character fine very nearly them as I've been in there a bunch of times..
This could be a large vacuum leak ,with the MAF aligned it is on your own measuring the ventilate that is getting once the MAF, in view of that if the intake manifold is sucking in air the air 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. in the same way as carb cleaner vaporizer vaporizer in the area of the hissing considering the engine supervision and following you hear the engine stall or rev sophisticated there is the leak ,could be a bad vacuum hose bad gasket on the manifold.