I have a 2004 ES330 with a hestitation problem. It is good from a full stop but next I go on the order of turns upon onto highway ramps, next I sadden the accellarator (sp?) it hesitates for 2 seconds past reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon once the thesame engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights slant on? Is the battery adequately charged? With or without headlights on. Relatively supplementary 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 correspondingly far? I ve cleaned the MAF sensor. Checked for connections in the intake. with I put my Turbo OBDII app on, everything seems fine except that the TPS stays constant roughly 30%. This is a drive-by-wire model correspondingly it has not throttle cable or usual TPS. I give a positive response the TPS is integrated in the same way as the throttle controller/motor. Mechanic s Assistant: anything else you desire the mechanic to know before I be close to you? No, I guess that is it.
Its next worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a not a hundred percent pump will all result in insufficient fuel inborn delivered to the engine. Might next be worth cleaning out the idle quickness manage motor / valve as these acquire clogged stirring next carbon and some brake cleaner washed through helps pardon things off.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you occurring 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 happening and is warmed up? oftentimes in engine deed many factors may cause the thesame symptom(s)