I have a 2004 ES330 in the same way as a hestitation problem. It is fine from a full stop but later I go approaching turns on onto highway ramps, subsequent to 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 behind the same engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights twist on? Is the battery sufficiently 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 therefore far? I ve cleaned the MAF sensor. Checked for contacts in the intake. subsequent to I put my Turbo OBDII app on, whatever seems fine except that the TPS stays constant just about 30%. This is a drive-by-wire model therefore it has not throttle cable or usual TPS. I agree to the TPS is integrated next the throttle controller/motor. Mechanic s Assistant: anything else you desire the mechanic to know previously I link up you? No, I guess that is it.
Might afterward be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can pull off a quick deformity locate if you unplug the meter and govern the engine without it. if the engine condition is the same after that chances are the meter or the attachment to it is faulty. Its after that worth cleaning the MAF sensor wires, as they can get coated when dirt over time which subsequently offsets the reading. Use some log on cleaner or brake cleaner to spray onto the wires to separate the dirt upon no account lie alongside the wires past all as they are totally fragile
This could be a large vacuum leak ,with the MAF similar it is on your own measuring the freshen that is getting similar to the MAF, correspondingly if the intake manifold is sucking in freshen the expose to fuel ratio will be utterly out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. subsequently carb cleaner vaporizer vaporizer in the place of the hissing similar to the engine management and later than you hear the engine stall or rev future there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.