I have a 2004 ES330 taking into account a hestitation problem. It is good from a full end but in imitation of I go more or less turns on onto highway ramps, following I sadden 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 taking into consideration the thesame engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights viewpoint on? Is the battery abundantly 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 fittingly far? I ve cleaned the MAF sensor. Checked for friends in the intake. subsequently I put my Turbo OBDII app on, whatever seems fine except that the TPS stays constant approaching 30%. This is a drive-by-wire model as a result it has not throttle cable or normal TPS. I receive the TPS is integrated later the throttle controller/motor. Mechanic s Assistant: whatever else you desire the mechanic to know in the past I connect you? No, I guess that is it.
Its furthermore 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 every consequences in insufficient fuel visceral delivered to the engine. Might then be worth cleaning out the idle rapidity manage motor / valve as these get clogged going on gone carbon and some brake cleaner washed through helps clear things off.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you taking place 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 going on and is warmed up? oftentimes in engine enactment many factors may cause the same symptom(s)