I have a 2004 ES330 afterward a hestitation problem. It is good from a full end but past I go in this area turns on onto highway ramps, later than I distress the accellarator (sp?) it hesitates for 2 seconds back reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon later than the same engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights viewpoint 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 thus far? I ve cleaned the MAF sensor. Checked for connections in the intake. when I put my Turbo OBDII app on, all seems good except that the TPS stays constant around 30%. This is a drive-by-wire model for that reason it has not throttle cable or normal TPS. I put up with the TPS is integrated in imitation of the throttle controller/motor. Mechanic s Assistant: everything else you desire the mechanic to know back I border you? No, I guess that is it.
Its along with worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a poorly pump will every outcome in insufficient fuel physical delivered to the engine. Might afterward be worth cleaning out the idle rapidity control motor / valve as these acquire clogged in the works next carbon and some brake cleaner washed through helps forgive things off.
I'm reviewing your question now, and will read out back subsequent to your answer ASAP. Rgds Greg. What malformation codes complete you have. Does the engine run taking into consideration the MAF disconnected. next the noisy hissing sealed this could be your problem. This could be a large vacuum leak ,with the MAF similar it is and no-one else measuring the ventilate that is getting in the same way as the MAF, for that reason if the intake manifold is sucking in air the ventilate to fuel ratio will be totally out and cause the engine to stal