I have a 2004 ES330 later than a hestitation problem. It is fine from a full end but later I go more or less turns on onto highway ramps, in the manner of I depress 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 in the manner of the same engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights incline on? Is the battery sufficiently 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 hence far? I ve cleaned the MAF sensor. Checked for friends in the intake. afterward I put my Turbo OBDII app on, all seems fine except that the TPS stays constant in this area 30%. This is a drive-by-wire model for that reason it has not throttle cable or usual TPS. I put up with the TPS is integrated as soon as the throttle controller/motor. Mechanic s Assistant: anything else you desire the mechanic to know previously I border you? No, I guess that is it.
Might next be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can realize a quick deformity locate if you unplug the meter and manage the engine without it. if the engine condition is the thesame subsequently chances are the meter or the relationship to it is faulty. Its after that worth cleaning the MAF sensor wires, as they can get coated behind dirt greater than period which next offsets the reading. Use some door cleaner or brake cleaner to spray can onto the wires to cut off the dirt upon no account touch the wires when anything as they are completely fragile
I'm reviewing your question now, and will proclaim urge on later your answer ASAP. Rgds Greg. What malfunction codes get you have. Does the engine run when the MAF disconnected. considering the noisy hissing hermetic this could be your problem. This could be a large vacuum leak ,with the MAF linked it is forlorn measuring the air that is getting afterward the MAF, as a result if the intake manifold is sucking in expose the ventilate to fuel ratio will be completely out and cause the engine to stal