I have a 2004 ES330 later than a hestitation problem. It is good from a full end but subsequent to I go more or less turns on onto highway ramps, following I hurt 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 afterward the similar engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights point on? Is the battery fully 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 consequently far? I ve cleaned the MAF sensor. Checked for connections in the intake. when I put my Turbo OBDII app on, whatever seems fine except that the TPS stays constant in relation to 30%. This is a drive-by-wire model thus it has not throttle cable or usual TPS. I say yes the TPS is integrated in the same way as the throttle controller/motor. Mechanic s Assistant: anything else you want the mechanic to know previously I attach you? No, I guess that is it.
Its with worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a ill pump will all consequences in insufficient fuel visceral delivered to the engine. Might next be worth cleaning out the idle zeal control motor / valve as these get clogged going on afterward carbon and some brake cleaner washed through helps free things off.
This could be a large vacuum leak ,with the MAF connected it is and no-one else measuring the ventilate that is getting in the manner of the MAF, correspondingly if the intake manifold is sucking in air the air to fuel ratio will be utterly out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. like carb cleaner spray can vaporizer in the area of the hissing later the engine direction and like you listen the engine stall or rev well ahead there is the leak ,could be a bad vacuum hose bad gasket on the manifold.