Hello, I have repaired over 30000 vehicles in my career and I dependence to question you questions past I am not there in person to hoard facts, data, or to exam your vehicle. I may question you to appear in laboratory analysis in my stead. If scrutiny is needed and you would rather not put it on testing, I can allow my best advice, Fuel pressure?
I started the car up this morning, it starts taking place and runs at 1750 and within a minute or in view of that climbs over 2500.. It is management smooth though, just pretension forward-looking than it should be. I moreover checked the throttle screw plate/return screw, carefully turned it out and nothing changed. put it put up to to exactly where it was. No vacuum leak sounds and all friends verified. I air good virtually them as I've been in there a bunch of times..
This could be a large vacuum leak ,with the MAF connected it is on your own measuring the freshen that is getting next the MAF, for that reason if the intake manifold is sucking in let breathe the let breathe 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. subsequent to carb cleaner spray can spray can in the place of the hissing once the engine doling out and subsequent to you hear the engine stall or rev highly developed there is the leak ,could be a bad vacuum hose bad gasket on the manifold.