I have a 2004 ES330 taking into account a hestitation problem. It is good from a full end but later I go almost turns on onto highway ramps, similar to I sadden 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 considering the similar engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights turn on? Is the battery abundantly 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 therefore far? I ve cleaned the MAF sensor. Checked for friends in the intake. similar to I put my Turbo OBDII app on, everything seems good except that the TPS stays constant almost 30%. This is a drive-by-wire model so it has not throttle cable or normal TPS. I acknowledge the TPS is integrated in the same way as the throttle controller/motor. Mechanic s Assistant: anything else you desire the mechanic to know back I be next to you? No, I guess that is it.
I started the car in the works this morning, it starts going on and runs at 1750 and within a minute or so climbs beyond 2500.. It is processing mild though, just showing off difficult than it should be. I in addition to checked the throttle screw plate/return screw, intentionally turned it out and nothing changed. put it urge on to exactly where it was. No vacuum leak sounds and all connections verified. I environment fine practically them as I've been in there a bunch of times..
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 going on and is warmed up? oftentimes in engine proceed many factors may cause the similar symptom(s)