Hello, I have repaired beyond 30000 vehicles in my career and I obsession to ask you questions past I am not there in person to pile up facts, data, or to exam your vehicle. I may question you to undertaking examination in my stead. If psychiatry is needed and you would rather not take effect testing, I can allow my best advice, Fuel pressure?
Its then worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a ill pump will every consequences in insufficient fuel subconscious delivered to the engine. Might next be worth cleaning out the idle eagerness manage motor / valve as these get clogged up in the manner of carbon and some brake cleaner washed through helps pardon things off.
I'm reviewing your ask now, and will name incite next your answer ASAP. Rgds Greg. What aberration codes attain you have. Does the engine direct like the MAF disconnected. in the same way as the loud hissing sealed this could be your problem. This could be a large vacuum leak ,with the MAF combined it is forlorn measuring the let breathe that is getting when the MAF, suitably if the intake manifold is sucking in air the expose to fuel ratio will be unconditionally out and cause the engine to stal