I have a 2004 ES330 later than a hestitation problem. It is good from a full end but past I go in relation to turns upon onto highway ramps, following I distress 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 taking into consideration the similar engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights slant on? Is the battery fully charged? With or without headlights on. Relatively other 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 hence far? I ve cleaned the MAF sensor. Checked for connections in the intake. bearing in mind I put my Turbo OBDII app on, anything seems good except that the TPS stays constant a propos 30%. This is a drive-by-wire model correspondingly it has not throttle cable or usual TPS. I receive the TPS is integrated taking into account the throttle controller/motor. Mechanic s Assistant: all else you desire the mechanic to know before I attach you? No, I guess that is it.
Its in addition to worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a under the weather pump will all result in insufficient fuel swine delivered to the engine. Might next be worth cleaning out the idle enthusiasm control motor / valve as these get clogged stirring similar to 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 occurring 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 in the works and is warmed up? oftentimes in engine fake many factors may cause the thesame symptom(s)