I have a 2004 ES330 in imitation of a hestitation problem. It is good from a full end but as soon as I go almost turns on onto highway ramps, when I sadden 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 once the same engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights viewpoint on? Is the battery abundantly charged? With or without headlights on. Relatively further 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 associates in the intake. with I put my Turbo OBDII app on, whatever seems good except that the TPS stays constant almost 30%. This is a drive-by-wire model hence it has not throttle cable or usual TPS. I recognize the TPS is integrated with the throttle controller/motor. Mechanic s Assistant: anything else you want the mechanic to know back I link up you? No, I guess that is it.
I started the car up this morning, it starts stirring and runs at 1750 and within a minute or for that reason climbs greater than 2500.. It is giving out serene though, just pretension superior than it should be. I furthermore checked the throttle screw plate/return screw, on purpose turned it out and nothing changed. put it put up to to exactly where it was. No vacuum leak sounds and every associates verified. I quality good more or less them as I've been in there a bunch of times..
This could be a large vacuum leak ,with the MAF associated it is single-handedly measuring the freshen that is getting subsequently the MAF, consequently if the intake manifold is sucking in air the freshen to fuel ratio will be utterly out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. considering carb cleaner spray spray can in the place of the hissing as soon as the engine organization and next you hear the engine stall or rev difficult there is the leak ,could be a bad vacuum hose bad gasket on the manifold.