I have a 2004 ES330 in the same way as a hestitation problem. It is fine from a full end but similar to I go on turns on onto highway ramps, with I depress 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 afterward the similar engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights perspective on? Is the battery thoroughly charged? With or without headlights on. Relatively additional 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 so far? I ve cleaned the MAF sensor. Checked for links in the intake. afterward I put my Turbo OBDII app on, anything seems good except that the TPS stays constant all but 30%. This is a drive-by-wire model appropriately it has not throttle cable or usual TPS. I agree to the TPS is integrated subsequently the throttle controller/motor. Mechanic s Assistant: anything else you want the mechanic to know previously I be next to you? No, I guess that is it.
Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me tell you a tiny more not quite the burden history. It currently has a master tech certified idle let breathe control valve and tps installed. without distressing anything, the last (used) ecu and my original, would control in the car without this symptom.
This could be a large vacuum leak ,with the MAF amalgamated it is and no-one else measuring the air that is getting like the MAF, as a result if the intake manifold is sucking in let breathe the ventilate 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. once carb cleaner spray spray in the place of the hissing as soon as the engine executive and following you listen the engine stall or rev superior there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.
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