This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and suitably not compensated for and can thin the engine out and can afterward permit the engine to rev occurring once not desired causing harsh running. As its a mechanical idiosyncrasy it tends not to direction on the deformity open and you can sometimes listen a hissing noise subsequently the engine running.
I started the car in the works this morning, it starts taking place and runs at 1750 and within a minute or so climbs higher than 2500.. It is admin serene though, just way well along than it should be. I afterward checked the throttle screw plate/return screw, purposefully turned it out and nothing changed. put it put up to to exactly where it was. No vacuum leak sounds and every connections verified. I environment fine about them as I've been in there a bunch of times..
I'm reviewing your question now, and will make known support with your reply ASAP. Rgds Greg. What defect codes do you have. Does the engine govern subsequent to the MAF disconnected. with the loud hissing unassailable this could be your problem. This could be a large vacuum leak ,with the MAF associated it is deserted measuring the let breathe that is getting taking into account the MAF, hence if the intake manifold is sucking in let breathe the expose to fuel ratio will be entirely out and cause the engine to stal