I have a 2004 ES330 in the same way as a hestitation problem. It is good from a full stop but when I go roughly speaking turns upon onto highway ramps, in the same way as 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 afterward the thesame engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights slant on? Is the battery fully charged? With or without headlights on. Relatively other 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 consequently far? I ve cleaned the MAF sensor. Checked for friends in the intake. following I put my Turbo OBDII app on, anything seems fine except that the TPS stays constant a propos 30%. This is a drive-by-wire model in view of that it has not throttle cable or normal TPS. I take on the TPS is integrated behind the throttle controller/motor. Mechanic s Assistant: whatever else you want the mechanic to know since I be close to you? No, I guess that is it.
Might after that be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can do a quick oddity find if you unplug the meter and run the engine without it. if the engine condition is the similar later chances are the meter or the attachment to it is faulty. Its afterward worth cleaning the MAF sensor wires, as they can get coated next dirt higher than grow old which subsequently offsets the reading. Use some gate cleaner or brake cleaner to spray onto the wires to cut off the dirt upon no account lie alongside the wires subsequently all as they are completely fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you happening to date upon every maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms up and is warmed up? oftentimes in engine behave many factors may cause the same symptom(s)