I have a 2004 ES330 behind a hestitation problem. It is fine from a full end but as soon as I go roughly speaking turns upon onto highway ramps, afterward I depress the accellarator (sp?) it hesitates for 2 seconds past reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon similar to the same engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights tilt on? Is the battery thoroughly charged? With or without headlights on. Relatively extra battery. Mechanic s Assistant: What is the model of your 04 Lexus? ES330 Mechanic s Assistant: Are you fixing your vehicle yourself? What have you tried so far? I ve cleaned the MAF sensor. Checked for contacts in the intake. taking into account I put my Turbo OBDII app on, whatever seems good except that the TPS stays constant not far off from 30%. This is a drive-by-wire model as a result it has not throttle cable or normal TPS. I consent the TPS is integrated subsequent to the throttle controller/motor. Mechanic s Assistant: all else you desire the mechanic to know previously I affix you? No, I guess that is it.
Might moreover be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can get a quick irregularity locate if you unplug the meter and govern the engine without it. if the engine condition is the similar later chances are the meter or the link to it is faulty. Its in addition to worth cleaning the MAF sensor wires, as they can get coated past dirt on top of time which later offsets the reading. Use some entre cleaner or brake cleaner to vaporizer onto the wires to separate the dirt on no account be adjacent to the wires in the same way as anything as they are very fragile
This could be a large vacuum leak ,with the MAF similar it is unaided measuring the ventilate that is getting gone the MAF, appropriately if the intake manifold is sucking in ventilate the ventilate to fuel ratio will be extremely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. with carb cleaner vaporizer spray can in the area of the hissing later than the engine presidency and past you hear the engine stall or rev progressive there is the leak ,could be a bad vacuum hose bad gasket on the manifold.