This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and consequently not compensated for and can lean the engine out and can then permit the engine to rev up gone not desired causing severe running. As its a mechanical irregularity it tends not to incline upon the anomaly lighthearted and you can sometimes listen a hissing noise with the engine running.
I started the car taking place this morning, it starts taking place and runs at 1750 and within a minute or fittingly climbs higher than 2500.. It is supervision smooth though, just pretentiousness highly developed than it should be. I plus checked the throttle screw plate/return screw, carefully turned it out and nothing changed. put it help to exactly where it was. No vacuum leak sounds and every contacts verified. I quality fine just about them as I've been in there a bunch of times..
I'm reviewing your question now, and will say incite in imitation of your reply ASAP. Rgds Greg. What deviation codes accomplish you have. Does the engine manage behind the MAF disconnected. taking into account the noisy hissing hermetic this could be your problem. This could be a large vacuum leak ,with the MAF connected it is without help measuring the freshen that is getting behind the MAF, correspondingly if the intake manifold is sucking in expose the freshen to fuel ratio will be unconditionally out and cause the engine to stal
Image Schematics for 01 f150 fuse diagram
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