Hello, I have repaired greater than 30000 vehicles in my career and I obsession to question you questions in the past I am not there in person to gather facts, data, or to test your vehicle. I may ask you to work breakdown in my stead. If scrutiny is needed and you would rather not doing 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 attain a fast irregularity locate if you unplug the meter and direct the engine without it. if the engine condition is the similar then chances are the meter or the membership to it is faulty. Its furthermore worth cleaning the MAF sensor wires, as they can acquire coated bearing in mind dirt greater than period which subsequently offsets the reading. Use some admission cleaner or brake cleaner to spray onto the wires to cut off the dirt on no account be next to the wires taking into consideration anything as they are unconditionally fragile
gone I start the car, the engine surges stirring in the midst of 1200 and 2000 rpm urge on and forth. I untouched the IAC and the TPS taking into account no correct in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to adapt the idle enthusiasm screw to lower the rpm and it would keep for a while. Now, the engine is every time surging to the narrowing where I cannot steer it for danger signal of damage to the steer train. Any experienced solution?