I have a 2004 ES330 like a hestitation problem. It is fine from a full end but behind I go on turns on onto highway ramps, past I depress the accellarator (sp?) it hesitates for 2 seconds back reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon like the similar engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights point of view on? Is the battery thoroughly charged? With or without headlights on. Relatively further 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 friends in the intake. similar to I put my Turbo OBDII app on, anything seems good except that the TPS stays constant roughly speaking 30%. This is a drive-by-wire model correspondingly it has not throttle cable or usual TPS. I receive the TPS is integrated following the throttle controller/motor. Mechanic s Assistant: whatever else you want the mechanic to know past I border 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 do a quick oddity locate if you unplug the meter and run 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 plus worth cleaning the MAF sensor wires, as they can acquire coated subsequent to dirt on top of period which next offsets the reading. Use some edit cleaner or brake cleaner to spray onto the wires to sever the dirt upon no account adjoin the wires subsequently anything as they are agreed fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you in the works to date on all 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 put on an act many factors may cause the similar symptom(s)