I have a 2004 ES330 with a hestitation problem. It is fine from a full end but past I go as regards turns on onto highway ramps, in imitation of I hurt 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 later the thesame engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights aim on? Is the battery sufficiently charged? With or without headlights on. Relatively additional 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 appropriately far? I ve cleaned the MAF sensor. Checked for links in the intake. as soon as I put my Turbo OBDII app on, all seems fine except that the TPS stays constant not far off from 30%. This is a drive-by-wire model thus it has not throttle cable or normal TPS. I put up with the TPS is integrated behind the throttle controller/motor. Mechanic s Assistant: all else you want the mechanic to know in the past I affix you? No, I guess that is it.
Its in addition to worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a in poor health pump will all result in insufficient fuel creature delivered to the engine. Might also be worth cleaning out the idle swiftness govern motor / valve as these acquire clogged stirring as soon as carbon and some brake cleaner washed through helps pardon things off.
This could be a large vacuum leak ,with the MAF joined it is lonely measuring the freshen that is getting next the MAF, consequently if the intake manifold is sucking in expose the ventilate to fuel ratio will be agreed out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. similar to carb cleaner spray spray in the place of the hissing past the engine dispensation and similar to you hear the engine stall or rev innovative there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.