Check the hose clips for tightness and examine the trunking for any cracks or splits and then every the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best pretension to locate a leak is to have the engine government and warm and subsequently vaporizer lighter gas /propane or brake cleaner concerning each joint in turn. If the engine rev s up you ve found your leak.
Might moreover be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can attain a fast aberration locate if you unplug the meter and run the engine without it. if the engine condition is the thesame later chances are the meter or the association to it is faulty. Its also worth cleaning the MAF sensor wires, as they can get coated next dirt higher than epoch which after that offsets the reading. Use some admission cleaner or brake cleaner to spray onto the wires to remove the dirt upon no account be adjacent to the wires in the same way as anything as they are definitely fragile
considering I begin the car, the engine surges going on amongst 1200 and 2000 rpm put up to and forth. I tainted the IAC and the TPS afterward no tweak in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to become accustomed the idle enthusiasm screw to humiliate the rpm and it would sustain for a while. Now, the engine is continuously surging to the reduction where I cannot drive it for radio alarm of broken to the steer train. Any experienced solution?