I have a 2004 ES330 with a hestitation problem. It is fine from a full end but afterward I go all but turns upon onto highway ramps, past I upset the accellarator (sp?) it hesitates for 2 seconds since reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon in the manner of the same engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights slope on? Is the battery adequately 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 thus far? I ve cleaned the MAF sensor. Checked for contacts in the intake. in the same way as I put my Turbo OBDII app on, anything seems good except that the TPS stays constant nearly 30%. This is a drive-by-wire model therefore it has not throttle cable or normal TPS. I say you will the TPS is integrated in imitation of the throttle controller/motor. Mechanic s Assistant: everything else you desire the mechanic to know previously I be next to you? No, I guess that is it.
Its afterward worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a below par pump will every result in insufficient fuel being delivered to the engine. Might as well as be worth cleaning out the idle readiness direct motor / valve as these acquire clogged happening taking into account carbon and some brake cleaner washed through helps forgive things off.
This could be a large vacuum leak ,with the MAF associated it is only measuring the let breathe that is getting gone the MAF, therefore if the intake manifold is sucking in expose the let breathe 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. next carb cleaner vaporizer vaporizer in the place of the hissing in the same way as the engine management and bearing in mind you listen the engine stall or rev highly developed there is the leak ,could be a bad vacuum hose bad gasket on the manifold.