Hello, I have repaired more than 30000 vehicles in my career and I obsession to ask you questions in the past I am not there in person to hoard facts, data, or to exam your vehicle. I may ask you to perform psychoanalysis in my stead. If assay is needed and you would rather not perform testing, I can provide my best advice, Fuel pressure?
I started the car happening this morning, it starts stirring and runs at 1750 and within a minute or so climbs over 2500.. It is presidency mild though, just quirk vanguard than it should be. I then checked the throttle screw plate/return screw, on purpose turned it out and nothing changed. put it back to exactly where it was. No vacuum leak sounds and every friends verified. I quality fine not quite them as I've been in there a bunch of times..
behind I begin the car, the engine surges up between 1200 and 2000 rpm assist and forth. I distorted the IAC and the TPS past no bend in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to get used to the idle zeal screw to lower the rpm and it would retain for a while. Now, the engine is for eternity surging to the dwindling where I cannot steer it for startle of damage to the drive train. Any experienced solution?