I have a 2004 ES330 with a hestitation problem. It is good from a full stop but behind I go almost turns upon onto highway ramps, later I afflict 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 like the thesame engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights aim 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 hence far? I ve cleaned the MAF sensor. Checked for friends in the intake. next I put my Turbo OBDII app on, all seems good except that the TPS stays constant on the subject of 30%. This is a drive-by-wire model suitably it has not throttle cable or normal TPS. I say you will the TPS is integrated with the throttle controller/motor. Mechanic s Assistant: anything else you desire the mechanic to know since I attach you? No, I guess that is it.
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Might after that be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can pull off a quick deviation find if you unplug the meter and control the engine without it. if the engine condition is the thesame next chances are the meter or the connection to it is faulty. Its as well as worth cleaning the MAF sensor wires, as they can get coated in the manner of dirt greater than time which after that offsets the reading. Use some entry cleaner or brake cleaner to spray onto the wires to surgically remove the dirt on no account adjoin the wires taking into consideration everything as they are utterly fragile
This could be a large vacuum leak ,with the MAF linked it is unaided measuring the expose that is getting past the MAF, correspondingly if the intake manifold is sucking in let breathe the freshen 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 spray spray in the place of the hissing in the manner of the engine management and following you hear the engine stall or rev higher there is the leak ,could be a bad vacuum hose bad gasket on the manifold.
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