I have a 2004 ES330 in imitation of a hestitation problem. It is fine from a full stop but with I go almost turns on onto highway ramps, as soon as I hurt 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 subsequently the same engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights point on? Is the battery adequately 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 consequently far? I ve cleaned the MAF sensor. Checked for associates in the intake. similar to I put my Turbo OBDII app on, all seems good except that the TPS stays constant on the subject of 30%. This is a drive-by-wire model suitably it has not throttle cable or usual TPS. I understand the TPS is integrated with the throttle controller/motor. Mechanic s Assistant: whatever else you desire the mechanic to know in the past I attach you? No, I guess that is it.
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I started the car in the works this morning, it starts occurring and runs at 1750 and within a minute or as a result climbs exceeding 2500.. It is meting out smooth though, just mannerism forward-looking than it should be. I along with checked the throttle screw plate/return screw, carefully turned it out and nothing changed. put it urge on to exactly where it was. No vacuum leak sounds and every friends verified. I tone fine about them as I've been in there a bunch of times..
This could be a large vacuum leak ,with the MAF partnered it is and no-one else measuring the freshen that is getting like the MAF, thus if the intake manifold is sucking in freshen the air to fuel ratio will be totally out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. behind carb cleaner spray can spray in the place of the hissing considering the engine processing and afterward you listen the engine stall or rev unconventional there is the leak ,could be a bad vacuum hose bad gasket on the manifold.
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