I have a 2004 ES330 once a hestitation problem. It is fine from a full end but behind I go on the order of turns upon onto highway ramps, later 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 behind the similar engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights slant on? Is the battery abundantly charged? With or without headlights on. Relatively extra 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 contacts in the intake. later than I put my Turbo OBDII app on, everything seems fine except that the TPS stays constant as regards 30%. This is a drive-by-wire model therefore it has not throttle cable or usual TPS. I consent the TPS is integrated later than the throttle controller/motor. Mechanic s Assistant: whatever else you want the mechanic to know previously I be next to you? No, I guess that is it.
Its moreover 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 result in insufficient fuel being delivered to the engine. Might next be worth cleaning out the idle quickness direct motor / valve as these acquire clogged stirring considering carbon and some brake cleaner washed through helps free things off.
This could be a large vacuum leak ,with the MAF linked it is solitary measuring the air that is getting in imitation of the MAF, for that reason if the intake manifold is sucking in air the expose to fuel ratio will be categorically 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 manner of carb cleaner spray vaporizer in the place of the hissing taking into account the engine government 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.