I have a 2004 ES330 once a hestitation problem. It is good from a full end but taking into consideration I go in relation to turns upon onto highway ramps, in imitation of I afflict the accellarator (sp?) it hesitates for 2 seconds in the past reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon in the same way as the same engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights point 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 suitably far? I ve cleaned the MAF sensor. Checked for contacts in the intake. in imitation of I put my Turbo OBDII app on, anything seems fine except that the TPS stays constant in relation to 30%. This is a drive-by-wire model appropriately it has not throttle cable or usual TPS. I allow the TPS is integrated subsequent to the throttle controller/motor. Mechanic s Assistant: whatever else you desire the mechanic to know in the past I attach you? No, I guess that is it.
Might next be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can realize a fast defect find if you unplug the meter and rule the engine without it. if the engine condition is the thesame next chances are the meter or the relationship to it is faulty. Its next worth cleaning the MAF sensor wires, as they can get coated in imitation of dirt exceeding period which subsequently offsets the reading. Use some approach cleaner or brake cleaner to spray can onto the wires to separate the dirt upon no account be next to the wires behind anything as they are unquestionably fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you happening 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 take steps many factors may cause the similar symptom(s)