I have a 2004 ES330 when a hestitation problem. It is fine from a full end but similar to I go on the subject of turns on onto highway ramps, subsequent to I hurt the accellarator (sp?) it hesitates for 2 seconds since reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon later than the thesame engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights turn on? Is the battery adequately charged? With or without headlights on. Relatively new 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 friends in the intake. in the same way as I put my Turbo OBDII app on, whatever seems good except that the TPS stays constant something like 30%. This is a drive-by-wire model therefore it has not throttle cable or normal TPS. I acknowledge the TPS is integrated in imitation of the throttle controller/motor. Mechanic s Assistant: all else you want the mechanic to know past I be next to you? No, I guess that is it.
Might in addition to be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can get a fast deviation locate if you unplug the meter and manage the engine without it. if the engine condition is the thesame later chances are the meter or the relationship to it is faulty. Its in addition to worth cleaning the MAF sensor wires, as they can get coated later dirt exceeding become old which subsequently offsets the reading. Use some read cleaner or brake cleaner to vaporizer onto the wires to sever the dirt on no account be adjacent to the wires once whatever as they are agreed fragile
This could be a large vacuum leak ,with the MAF linked it is unaccompanied measuring the ventilate that is getting in imitation of the MAF, therefore if the intake manifold is sucking in ventilate the freshen to fuel ratio will be entirely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. in the same way as carb cleaner spray can vaporizer in the area of the hissing like the engine giving out and taking into consideration you hear the engine stall or rev well ahead there is the leak ,could be a bad vacuum hose bad gasket on the manifold.