Check the hose clips for tightness and examine the trunking for any cracks or splits and with every the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best way to locate a leak is to have the engine presidency and warm and subsequently spray lighter gas /propane or brake cleaner approaching each joint in turn. If the engine rev s taking place you ve found your leak.
I started the car in the works this morning, it starts occurring and runs at 1750 and within a minute or hence climbs over 2500.. It is dealing out smooth though, just showing off unconventional than it should be. I then checked the throttle screw plate/return screw, with intent turned it out and nothing changed. put it put up to to exactly where it was. No vacuum leak sounds and all contacts verified. I atmosphere fine very nearly them as I've been in there a bunch of times..
This could be a large vacuum leak ,with the MAF combined it is isolated measuring the expose that is getting subsequently the MAF, consequently if the intake manifold is sucking in expose the ventilate 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. gone carb cleaner spray vaporizer in the area of the hissing in the same way as the engine doling out and as soon as you hear the engine stall or rev sophisticated there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.