I have a 2004 ES330 with a hestitation problem. It is fine from a full stop but in imitation of I go approaching turns on onto highway ramps, considering I pain 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 begin and has no hesitation. Mechanic s Assistant: Will the headlights viewpoint 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 consequently far? I ve cleaned the MAF sensor. Checked for friends in the intake. in the same way as I put my Turbo OBDII app on, all seems fine except that the TPS stays constant almost 30%. This is a drive-by-wire model therefore it has not throttle cable or normal TPS. I take on the TPS is integrated when the throttle controller/motor. Mechanic s Assistant: everything else you desire the mechanic to know back I be next to you? No, I guess that is it.
I started the car going on this morning, it starts happening and runs at 1750 and within a minute or appropriately climbs exceeding 2500.. It is admin serene though, just way higher than it should be. I moreover checked the throttle screw plate/return screw, carefully turned it out and nothing changed. put it assist to exactly where it was. No vacuum leak sounds and all contacts 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 stirring to date on every maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms taking place and is warmed up? oftentimes in engine perform many factors may cause the same symptom(s)