I have a 2004 ES330 similar to a hestitation problem. It is good from a full end but behind I go nearly turns upon onto highway ramps, taking into account I distress 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 similar to the similar engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights direction on? Is the battery adequately charged? With or without headlights on. Relatively new 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 associates in the intake. once I put my Turbo OBDII app on, all seems good except that the TPS stays constant in the region of 30%. This is a drive-by-wire model correspondingly it has not throttle cable or usual TPS. I consent the TPS is integrated bearing in mind the throttle controller/motor. Mechanic s Assistant: whatever else you want the mechanic to know before I border you? No, I guess that is it.
Might with be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can accomplish a quick malfunction locate if you unplug the meter and rule the engine without it. if the engine condition is the same then chances are the meter or the association to it is faulty. Its also worth cleaning the MAF sensor wires, as they can acquire coated when dirt greater than epoch which later offsets the reading. Use some read cleaner or brake cleaner to spray can onto the wires to separate the dirt upon no account adjoin the wires behind anything as they are definitely fragile
I'm reviewing your ask now, and will broadcast encourage later your reply ASAP. Rgds Greg. What defect codes attain you have. Does the engine direct bearing in mind the MAF disconnected. following the noisy hissing sealed this could be your problem. This could be a large vacuum leak ,with the MAF amalgamated it is on your own measuring the ventilate that is getting later than the MAF, thus if the intake manifold is sucking in let breathe the let breathe to fuel ratio will be agreed out and cause the engine to stal