I have a 2004 ES330 in the manner of a hestitation problem. It is fine from a full stop but subsequent to I go not far off from turns on onto highway ramps, afterward I upset 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 later than the similar engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights face on? Is the battery fully 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 for that reason far? I ve cleaned the MAF sensor. Checked for connections in the intake. once I put my Turbo OBDII app on, all seems good except that the TPS stays constant almost 30%. This is a drive-by-wire model appropriately it has not throttle cable or normal TPS. I understand the TPS is integrated with the throttle controller/motor. Mechanic s Assistant: anything 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 ill pump will all upshot in insufficient fuel living thing delivered to the engine. Might in addition to be worth cleaning out the idle quickness manage motor / valve as these get clogged occurring in the same way as 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 stirring 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 in the works and is warmed up? oftentimes in engine performance many factors may cause the same symptom(s)