I have a 2004 ES330 following a hestitation problem. It is good from a full stop but following I go with reference to turns upon onto highway ramps, in imitation of I pain the accellarator (sp?) it hesitates for 2 seconds previously reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon taking into consideration the same engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights tilt on? Is the battery fully 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 for that reason far? I ve cleaned the MAF sensor. Checked for associates in the intake. past I put my Turbo OBDII app on, everything seems good except that the TPS stays constant all but 30%. This is a drive-by-wire model hence it has not throttle cable or usual TPS. I put up with the TPS is integrated similar to the throttle controller/motor. Mechanic s Assistant: all else you want the mechanic to know past I affix you? No, I guess that is it.
Might after that be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can complete a fast irregularity locate if you unplug the meter and manage the engine without it. if the engine condition is the same subsequently chances are the meter or the attachment to it is faulty. Its moreover worth cleaning the MAF sensor wires, as they can acquire coated gone dirt beyond time which then offsets the reading. Use some gain access to cleaner or brake cleaner to vaporizer onto the wires to cut off the dirt on no account be next to the wires with everything as they are unconditionally fragile
This could be a large vacuum leak ,with the MAF partnered it is on your own measuring the ventilate that is getting in the manner of the MAF, correspondingly if the intake manifold is sucking in expose the let breathe to fuel ratio will be definitely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. following carb cleaner vaporizer vaporizer in the area of the hissing similar to the engine supervision and with you hear the engine stall or rev progressive there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.