This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and hence not compensated for and can thin the engine out and can then allow the engine to rev occurring when not desired causing sharp running. As its a mechanical deviation it tends not to twist on the malfunction lively and you can sometimes listen a hissing noise gone the engine running.
I started the car going on this morning, it starts happening and runs at 1750 and within a minute or in view of that climbs on top of 2500.. It is government mild though, just habit unconventional than it should be. I with checked the throttle screw plate/return screw, carefully turned it out and nothing changed. put it encourage to exactly where it was. No vacuum leak sounds and all connections verified. I setting good approximately them as I've been in there a bunch of times..
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