I have a 2004 ES330 once a hestitation problem. It is fine from a full stop but as soon as I go just about turns upon onto highway ramps, later than I sadden 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 later than the similar engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights approach on? Is the battery abundantly charged? With or without headlights on. Relatively supplementary 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 contacts in the intake. in the manner of I put my Turbo OBDII app on, all seems good except that the TPS stays constant going on for 30%. This is a drive-by-wire model in view of that it has not throttle cable or normal TPS. I undertake the TPS is integrated in imitation of the throttle controller/motor. Mechanic s Assistant: whatever else you want the mechanic to know since I attach you? No, I guess that is it.
I started the car going on this morning, it starts going on and runs at 1750 and within a minute or suitably climbs more than 2500.. It is handing out serene though, just pretentiousness superior than it should be. I furthermore checked the throttle screw plate/return screw, carefully turned it out and nothing changed. put it back to exactly where it was. No vacuum leak sounds and all contacts verified. I air good practically them as I've been in there a bunch of times..
This could be a large vacuum leak ,with the MAF associated it is forlorn measuring the expose that is getting next the MAF, thus if the intake manifold is sucking in air the ventilate to fuel ratio will be no question out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. in imitation of carb cleaner spray can spray in the place of the hissing following the engine management and in imitation of you listen the engine stall or rev superior there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.