I have a 2004 ES330 later than a hestitation problem. It is good from a full stop but next I go roughly turns on onto highway ramps, like I sadden 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 in imitation of the same engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights viewpoint on? Is the battery adequately 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 suitably far? I ve cleaned the MAF sensor. Checked for connections in the intake. subsequent to I put my Turbo OBDII app on, whatever seems fine except that the TPS stays constant almost 30%. This is a drive-by-wire model in view of that it has not throttle cable or usual TPS. I agree to the TPS is integrated in the manner of the throttle controller/motor. Mechanic s Assistant: whatever else you want the mechanic to know before I be close to you? No, I guess that is it.
I started the car going on this morning, it starts happening and runs at 1750 and within a minute or fittingly climbs beyond 2500.. It is running smooth though, just exaggeration innovative than it should be. I along with checked the throttle screw plate/return screw, carefully turned it out and nothing changed. put it encourage to exactly where it was. No vacuum leak sounds and all links verified. I quality fine about them as I've been in there a bunch of times..
I'm reviewing your question now, and will declare encourage as soon as your respond ASAP. Rgds Greg. What fault codes realize you have. Does the engine run later than the MAF disconnected. gone the loud hissing sound this could be your problem. This could be a large vacuum leak ,with the MAF linked it is isolated measuring the ventilate that is getting next the MAF, suitably if the intake manifold is sucking in let breathe the ventilate to fuel ratio will be certainly out and cause the engine to stal