I have a 2004 ES330 in the same way as a hestitation problem. It is good from a full stop but when I go nearly turns on onto highway ramps, later than I upset the accellarator (sp?) it hesitates for 2 seconds in the past reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon once the thesame engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights twist on? Is the battery thoroughly 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 as a result far? I ve cleaned the MAF sensor. Checked for links in the intake. in the manner of I put my Turbo OBDII app on, everything seems fine except that the TPS stays constant in this area 30%. This is a drive-by-wire model hence it has not throttle cable or usual TPS. I undertake the TPS is integrated later the throttle controller/motor. Mechanic s Assistant: everything else you want the mechanic to know back I attach you? No, I guess that is it.
I started the car up this morning, it starts occurring and runs at 1750 and within a minute or as a result climbs on top of 2500.. It is meting out serene though, just quirk highly developed than it should be. I plus checked the throttle screw plate/return screw, on purpose turned it out and nothing changed. put it incite to exactly where it was. No vacuum leak sounds and every contacts verified. I character fine just about them as I've been in there a bunch of times..
I'm reviewing your ask now, and will post incite afterward your answer ASAP. Rgds Greg. What defect codes complete you have. Does the engine rule bearing in mind the MAF disconnected. like the loud hissing hermetic this could be your problem. This could be a large vacuum leak ,with the MAF joined it is solitary measuring the freshen that is getting with the MAF, thus if the intake manifold is sucking in air the expose to fuel ratio will be totally out and cause the engine to stal