I have a 2004 ES330 when a hestitation problem. It is good from a full stop but past I go just about turns upon onto highway ramps, gone I depress the accellarator (sp?) it hesitates for 2 seconds before reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon similar to the similar engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights incline on? Is the battery adequately charged? With or without headlights on. Relatively additional 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 appropriately far? I ve cleaned the MAF sensor. Checked for links in the intake. taking into consideration I put my Turbo OBDII app on, whatever seems good except that the TPS stays constant just about 30%. This is a drive-by-wire model suitably it has not throttle cable or usual TPS. I bow to the TPS is integrated when the throttle controller/motor. Mechanic s Assistant: whatever else you desire the mechanic to know past I be next to you? No, I guess that is it.
Its as well as worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a sick pump will all repercussion in insufficient fuel instinctive delivered to the engine. Might moreover be worth cleaning out the idle keenness rule motor / valve as these get clogged up in imitation 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 going on to date upon all 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 take steps many factors may cause the same symptom(s)