Now you might think that spraying lighter gas vis--vis a warm engine isnt wise, however the flash /ignition lessening of gas is nearly 400C fittingly you need a naked flame or spark to set it off and Ive used this method for many years without incident. play your way through each feasible joint one at a time and you should locate it. I use a slightly flattened fragment of brake pipe and some rubber hose from the can of lighter gas to have the funds for a spraying wand and allow a attend to blast of gas into each area, especially those hard to reach following large implements.
Might also be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can do a quick malfunction locate if you unplug the meter and manage the engine without it. if the engine condition is the similar after that chances are the meter or the relationship to it is faulty. Its after that worth cleaning the MAF sensor wires, as they can acquire coated in the manner of dirt more than get older which later offsets the reading. Use some retrieve cleaner or brake cleaner to vaporizer onto the wires to surgically remove the dirt on no account be adjacent to the wires behind whatever as they are completely fragile
gone I start the car, the engine surges stirring amongst 1200 and 2000 rpm back up and forth. I untouched the IAC and the TPS in imitation of no modify in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to adapt the idle speed screw to humiliate the rpm and it would withhold for a while. Now, the engine is forever surging to the point where I cannot drive it for fright of damage to the steer train. Any experienced solution?