I have a 2004 ES330 with a hestitation problem. It is fine from a full end but once I go almost turns upon onto highway ramps, with I hurt 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 similar to the thesame engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights face on? Is the battery abundantly 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 so far? I ve cleaned the MAF sensor. Checked for links in the intake. in the manner of I put my Turbo OBDII app on, whatever seems fine except that the TPS stays constant something like 30%. This is a drive-by-wire model as a result it has not throttle cable or usual TPS. I admit the TPS is integrated bearing in mind the throttle controller/motor. Mechanic s Assistant: all else you desire the mechanic to know back I attach you? No, I guess that is it.
Might also be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can do a fast anomaly find if you unplug the meter and govern the engine without it. if the engine condition is the same after that chances are the meter or the membership to it is faulty. Its moreover worth cleaning the MAF sensor wires, as they can acquire coated subsequent to dirt greater than period which after that offsets the reading. Use some read cleaner or brake cleaner to vaporizer onto the wires to sever the dirt on no account touch the wires subsequent to all as they are enormously fragile
This could be a large vacuum leak ,with the MAF connected it is lonely measuring the ventilate that is getting afterward the MAF, appropriately if the intake manifold is sucking in let breathe the let breathe to fuel ratio will be certainly out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. in the same way as carb cleaner spray can spray in the place of the hissing taking into consideration the engine dispensation and next you listen the engine stall or rev progressive there is the leak ,could be a bad vacuum hose bad gasket on the manifold.