Hello, I have repaired greater than 30000 vehicles in my career and I habit to question you questions before I am not there in person to pile up facts, data, or to exam your vehicle. I may ask you to act out psychotherapy in my stead. If examination is needed and you would rather not pretend testing, I can provide my best advice, Fuel pressure?
Might plus be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can do a fast irregularity find if you unplug the meter and govern the engine without it. if the engine condition is the thesame after that chances are the meter or the attachment to it is faulty. Its along with worth cleaning the MAF sensor wires, as they can acquire coated past dirt beyond times which next offsets the reading. Use some door cleaner or brake cleaner to spray onto the wires to remove the dirt on no account be next to the wires gone all as they are unconditionally fragile
later I begin the car, the engine surges happening amid 1200 and 2000 rpm support and forth. I changed the IAC and the TPS in the manner of no amend in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to accustom yourself the idle speed screw to demean the rpm and it would withhold for a while. Now, the engine is constantly surging to the reduction where I cannot steer it for buzzer of damage to the steer train. Any experienced solution?