I have a 2004 ES330 in the same way as a hestitation problem. It is fine from a full stop but later I go roughly turns upon onto highway ramps, gone I afflict the accellarator (sp?) it hesitates for 2 seconds since 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 begin and has no hesitation. Mechanic s Assistant: Will the headlights direction on? Is the battery sufficiently charged? With or without headlights on. Relatively further 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 therefore far? I ve cleaned the MAF sensor. Checked for links in the intake. bearing in mind I put my Turbo OBDII app on, everything seems fine except that the TPS stays constant regarding 30%. This is a drive-by-wire model thus it has not throttle cable or normal TPS. I agree to the TPS is integrated in the same way as the throttle controller/motor. Mechanic s Assistant: anything else you want the mechanic to know previously I attach you? No, I guess that is it.
I started the car going on this morning, it starts in the works and runs at 1750 and within a minute or thus climbs on top of 2500.. It is executive serene though, just habit forward-looking than it should be. I along with checked the throttle screw plate/return screw, deliberately turned it out and nothing changed. put it back to exactly where it was. No vacuum leak sounds and every connections verified. I vibes good not quite them as I've been in there a bunch of times..
taking into account I begin the car, the engine surges happening in the midst of 1200 and 2000 rpm incite and forth. I untouched the IAC and the TPS when no alter in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to adjust the idle eagerness screw to belittle the rpm and it would withhold for a while. Now, the engine is at all times surging to the point where I cannot steer it for terror of broken to the drive train. Any experienced solution?