I have a 2004 ES330 later than a hestitation problem. It is fine from a full stop but considering I go just about turns on onto highway ramps, considering I afflict 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 bearing in mind the similar engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights point of view on? Is the battery fully charged? With or without headlights on. Relatively other 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 as a result far? I ve cleaned the MAF sensor. Checked for links in the intake. like I put my Turbo OBDII app on, all seems fine except that the TPS stays constant in relation to 30%. This is a drive-by-wire model correspondingly it has not throttle cable or normal TPS. I resign yourself to the TPS is integrated taking into account the throttle controller/motor. Mechanic s Assistant: whatever else you desire the mechanic to know back I attach you? No, I guess that is it.
Its next 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 every consequences in insufficient fuel monster delivered to the engine. Might with be worth cleaning out the idle readiness direct motor / valve as these acquire clogged occurring following carbon and some brake cleaner washed through helps release things off.
This could be a large vacuum leak ,with the MAF united it is by yourself measuring the ventilate that is getting past the MAF, hence if the intake manifold is sucking in air the ventilate to fuel ratio will be very out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. taking into consideration carb cleaner spray spray can in the place of the hissing past the engine handing out and as soon as you hear the engine stall or rev progressive there is the leak ,could be a bad vacuum hose bad gasket on the manifold.