I have a 2004 ES330 once a hestitation problem. It is fine from a full end but past I go approximately turns on onto highway ramps, once I sadden the accellarator (sp?) it hesitates for 2 seconds in the past reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon next the same engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights point on? Is the battery fully charged? With or without headlights on. Relatively supplementary 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 suitably far? I ve cleaned the MAF sensor. Checked for contacts in the intake. bearing in mind I put my Turbo OBDII app on, everything seems good except that the TPS stays constant something like 30%. This is a drive-by-wire model for that reason it has not throttle cable or usual TPS. I assume the TPS is integrated in the manner of the throttle controller/motor. Mechanic s Assistant: whatever else you desire the mechanic to know past I connect 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 poorly pump will every upshot in insufficient fuel being delivered to the engine. Might with be worth cleaning out the idle promptness control motor / valve as these acquire clogged occurring later than carbon and some brake cleaner washed through helps pardon things off.
I don't have any check engine lights unless I unplug the MAF sensor. afterward the MAF is plugged in next the car will stall unless I put my foot upon the accelerator. There is as a consequence an intermittent popping hermetic coming at idle.