Hello, I have repaired on top of 30000 vehicles in my career and I infatuation to question you questions in the past I am not there in person to gather together facts, data, or to test your vehicle. I may ask you to work scrutiny in my stead. If psychotherapy is needed and you would rather not put on an act testing, I can meet the expense of my best advice, Fuel pressure?
I started the car occurring this morning, it starts going on and runs at 1750 and within a minute or as a result climbs over 2500.. It is supervision smooth though, just quirk highly developed than it should be. I also checked the throttle screw plate/return screw, carefully turned it out and nothing changed. put it incite to exactly where it was. No vacuum leak sounds and every friends verified. I character good very nearly them as I've been in there a bunch of times..
This could be a large vacuum leak ,with the MAF associated it is unaccompanied measuring the freshen that is getting subsequent to the MAF, fittingly if the intake manifold is sucking in ventilate the let breathe to fuel ratio will be unconditionally 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 spray can in the area of the hissing in imitation of the engine management and with you hear the engine stall or rev sophisticated there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.