Hello, I have repaired greater than 30000 vehicles in my career and I habit to question you questions past I am not there in person to store up facts, data, or to exam your vehicle. I may ask you to perform testing in my stead. If assay is needed and you would rather not discharge duty testing, I can provide my best advice, Fuel pressure?
I started the car taking place this morning, it starts stirring and runs at 1750 and within a minute or as a result climbs over 2500.. It is processing mild though, just pretentiousness well along than it should be. I afterward checked the throttle screw plate/return screw, on purpose turned it out and nothing changed. put it back up to exactly where it was. No vacuum leak sounds and every links verified. I air fine not quite them as I've been in there a bunch of times..
subsequent to I start the car, the engine surges stirring along with 1200 and 2000 rpm back up and forth. I misrepresented the IAC and the TPS subsequent to no alter in symptoms. I have noticed that several Lexus SC's have this same issue. Prior to this I would have to become accustomed the idle quickness screw to humiliate the rpm and it would sustain for a while. Now, the engine is for eternity surging to the narrowing where I cannot steer it for fright of damage to the drive train. Any experienced solution?