I have a 2004 ES330 following a hestitation problem. It is good from a full stop but later than I go on the order of turns on onto highway ramps, in the manner of I depress the accellarator (sp?) it hesitates for 2 seconds previously reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon with the thesame engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights position on? Is the battery sufficiently charged? With or without headlights on. Relatively further 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 as a result far? I ve cleaned the MAF sensor. Checked for friends in the intake. subsequent to 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 for that reason it has not throttle cable or usual TPS. I give a positive response the TPS is integrated with the throttle controller/motor. Mechanic s Assistant: whatever else you desire the mechanic to know in the past I be close to you? No, I guess that is it.
Its afterward worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a poorly pump will all upshot in insufficient fuel visceral delivered to the engine. Might also be worth cleaning out the idle keenness control motor / valve as these acquire clogged stirring following 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 happening to date upon every 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 affect many factors may cause the thesame symptom(s)