Hello, I have repaired exceeding 30000 vehicles in my career and I obsession to question you questions back I am not there in person to gather facts, data, or to test your vehicle. I may question you to discharge duty study in my stead. If investigation is needed and you would rather not produce an effect testing, I can offer my best advice, Fuel pressure?
I started the car up this morning, it starts occurring and runs at 1750 and within a minute or therefore climbs greater than 2500.. It is running smooth though, just way unconventional than it should be. I moreover checked the throttle screw plate/return screw, purposefully turned it out and nothing changed. put it assist to exactly where it was. No vacuum leak sounds and all connections verified. I vibes good not quite them as I've been in there a bunch of times..
bearing in mind I begin the car, the engine surges taking place amongst 1200 and 2000 rpm support and forth. I misused the IAC and the TPS following no amend in symptoms. I have noticed that several Lexus SC's have this same issue. Prior to this I would have to acclimatize the idle enthusiasm screw to lower the rpm and it would retain for a while. Now, the engine is at all times surging to the lessening where I cannot drive it for panic of damage to the drive train. Any experienced solution?