Hello, I have repaired higher than 30000 vehicles in my career and I infatuation to question you questions previously I am not there in person to stockpile facts, data, or to exam your vehicle. I may question you to acquit yourself scrutiny in my stead. If study is needed and you would rather not operate testing, I can give my best advice, Fuel pressure?
I started the car taking place this morning, it starts in the works and runs at 1750 and within a minute or appropriately climbs higher than 2500.. It is organization smooth though, just pretentiousness highly developed than it should be. I in addition to checked the throttle screw plate/return screw, with intent turned it out and nothing changed. put it encourage to exactly where it was. No vacuum leak sounds and every friends verified. I mood fine just about them as I've been in there a bunch of times..
This could be a large vacuum leak ,with the MAF united it is lonely measuring the expose that is getting like the MAF, therefore if the intake manifold is sucking in air the expose to fuel ratio will be very out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. bearing in mind carb cleaner vaporizer vaporizer in the area of the hissing taking into account the engine executive and in the same way as you hear the engine stall or rev well along there is the leak ,could be a bad vacuum hose bad gasket on the manifold.