I have a 2004 ES330 in the manner of a hestitation problem. It is good from a full end but afterward I go in this area turns upon onto highway ramps, in imitation of I distress the accellarator (sp?) it hesitates for 2 seconds past reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon bearing in mind the thesame engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights twist 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 consequently far? I ve cleaned the MAF sensor. Checked for links in the intake. later I put my Turbo OBDII app on, whatever seems fine except that the TPS stays constant not far off from 30%. This is a drive-by-wire model as a result it has not throttle cable or usual TPS. I receive the TPS is integrated with the throttle controller/motor. Mechanic s Assistant: anything else you desire the mechanic to know previously I connect you? No, I guess that is it.
Its then worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a below par pump will every repercussion in insufficient fuel bodily delivered to the engine. Might furthermore be worth cleaning out the idle eagerness rule motor / valve as these acquire clogged happening next carbon and some brake cleaner washed through helps free things off.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you going on 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 up and is warmed up? oftentimes in engine be active many factors may cause the same symptom(s)