Hello, I have repaired higher than 30000 vehicles in my career and I dependence to question you questions past I am not there in person to gather facts, data, or to test your vehicle. I may ask you to conduct yourself investigation in my stead. If examination is needed and you would rather not play testing, I can have the funds for 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 get a fast anomaly 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 association to it is faulty. Its in addition to worth cleaning the MAF sensor wires, as they can get coated once dirt on top of period which then offsets the reading. Use some read cleaner or brake cleaner to spray can onto the wires to surgically remove the dirt upon no account lie alongside the wires considering all as they are categorically fragile
bearing in mind I begin the car, the engine surges taking place amid 1200 and 2000 rpm incite and forth. I untouched the IAC and the TPS with no amend in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to adapt the idle swiftness screw to lower the rpm and it would preserve for a while. Now, the engine is continuously surging to the lessening where I cannot drive it for apprehension of damage to the drive train. Any experienced solution?