I have a 2004 ES330 following a hestitation problem. It is fine from a full end but bearing in mind I go roughly speaking turns on onto highway ramps, as soon as I depress 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 considering the same engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights slant on? Is the battery thoroughly 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 therefore far? I ve cleaned the MAF sensor. Checked for friends in the intake. like I put my Turbo OBDII app on, all seems fine except that the TPS stays constant roughly speaking 30%. This is a drive-by-wire model in view of that it has not throttle cable or usual TPS. I put up with the TPS is integrated taking into account 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.
Its with worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a under the weather pump will every result in insufficient fuel creature delivered to the engine. Might then be worth cleaning out the idle rapidity run motor / valve as these acquire clogged happening in the manner of carbon and some brake cleaner washed through helps forgive things off.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you up 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 happening and is warmed up? oftentimes in engine play in many factors may cause the similar symptom(s)