Hello, I have repaired higher than 30000 vehicles in my career and I habit to ask you questions previously I am not there in person to gather together facts, data, or to exam your vehicle. I may question you to produce a result scrutiny in my stead. If psychoanalysis is needed and you would rather not doing testing, I can find the money for my best advice, Fuel pressure?
I started the car taking place this morning, it starts occurring and runs at 1750 and within a minute or as a result climbs greater than 2500.. It is processing mild though, just habit far ahead than it should be. I as well as checked the throttle screw plate/return screw, intentionally turned it out and nothing changed. put it assist to exactly where it was. No vacuum leak sounds and all contacts verified. I quality good about them as I've been in there a bunch of times..
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you going on to date on every maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms occurring and is warmed up? oftentimes in engine accomplish many factors may cause the same symptom(s)