I have a 2004 ES330 afterward a hestitation problem. It is good from a full end but taking into account I go not far off from turns on onto highway ramps, following 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 in imitation of the similar engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights position on? Is the battery abundantly charged? With or without headlights on. Relatively extra 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. next I put my Turbo OBDII app on, anything seems fine except that the TPS stays constant a propos 30%. This is a drive-by-wire model suitably it has not throttle cable or usual TPS. I tolerate the TPS is integrated subsequent to the throttle controller/motor. Mechanic s Assistant: anything else you want the mechanic to know back I attach you? No, I guess that is it.
I started the car in the works this morning, it starts going on and runs at 1750 and within a minute or in view of that climbs beyond 2500.. It is giving out serene though, just pretension forward-thinking than it should be. I in addition to checked the throttle screw plate/return screw, with intent turned it out and nothing changed. put it back up to exactly where it was. No vacuum leak sounds and all contacts verified. I tone fine very nearly them as I've been in there a bunch of times..
This could be a large vacuum leak ,with the MAF partnered it is lonely measuring the freshen that is getting with the MAF, thus if the intake manifold is sucking in freshen the ventilate to fuel ratio will be categorically out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. with carb cleaner spray can spray can in the place of the hissing subsequent to the engine giving out and once you hear the engine stall or rev later there is the leak ,could be a bad vacuum hose bad gasket on the manifold.