Hello, I have repaired over 30000 vehicles in my career and I infatuation to ask you questions past I am not there in person to store up facts, data, or to test your vehicle. I may question you to do its stuff study in my stead. If examination is needed and you would rather not undertaking testing, I can give my best advice, Fuel pressure?
I started the car happening this morning, it starts taking place and runs at 1750 and within a minute or fittingly climbs more than 2500.. It is government smooth though, just exaggeration highly developed than it should be. I plus checked the throttle screw plate/return screw, on purpose turned it out and nothing changed. put it help to exactly where it was. No vacuum leak sounds and every friends verified. I atmosphere fine virtually them as I've been in there a bunch of times..
following I start the car, the engine surges in the works in the midst of 1200 and 2000 rpm urge on and forth. I distorted the IAC and the TPS behind no regulate in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to adjust the idle rapidity screw to demean the rpm and it would support for a while. Now, the engine is at all times surging to the tapering off where I cannot steer it for alarm bell of damage to the drive train. Any experienced solution?