I have a 2004 ES330 as soon as a hestitation problem. It is good from a full stop but taking into account I go in this area turns on onto highway ramps, next I upset 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 similar to the same engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights slant on? Is the battery fully 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 thus far? I ve cleaned the MAF sensor. Checked for contacts in the intake. similar to I put my Turbo OBDII app on, everything seems good except that the TPS stays constant with reference to 30%. This is a drive-by-wire model in view of that it has not throttle cable or usual TPS. I recognize the TPS is integrated bearing in mind the throttle controller/motor. Mechanic s Assistant: all else you want the mechanic to know past I attach 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 accomplish a quick oddity locate if you unplug the meter and control the engine without it. if the engine condition is the similar subsequently chances are the meter or the association to it is faulty. Its also worth cleaning the MAF sensor wires, as they can acquire coated in the same way as dirt beyond period which later offsets the reading. Use some door cleaner or brake cleaner to spray can onto the wires to surgically remove the dirt upon no account be adjacent to the wires bearing in mind anything as they are entirely fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you taking place 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 going on and is warmed up? oftentimes in engine ham it up many factors may cause the same symptom(s)