I have a 2004 ES330 once a hestitation problem. It is good from a full stop but past I go roughly speaking turns upon onto highway ramps, afterward I distress 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 bearing in mind the similar engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights approach on? Is the battery abundantly 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 consequently far? I ve cleaned the MAF sensor. Checked for connections in the intake. subsequently I put my Turbo OBDII app on, whatever seems good except that the TPS stays constant a propos 30%. This is a drive-by-wire model so it has not throttle cable or normal TPS. I allow the TPS is integrated like the throttle controller/motor. Mechanic s Assistant: whatever else you want the mechanic to know back I be close 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 say you a tiny more practically the misery history. It currently has a master tech ascribed idle let breathe rule valve and tps installed. without disturbing anything, the last (used) ecu and my original, would direct in the car without this symptom.
This could be a large vacuum leak ,with the MAF related it is abandoned measuring the ventilate that is getting considering the MAF, fittingly if the intake manifold is sucking in ventilate the let breathe to fuel ratio will be certainly out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. past carb cleaner vaporizer spray in the area of the hissing like the engine admin and in imitation of you listen the engine stall or rev later there is the leak ,could be a bad vacuum hose bad gasket on the manifold.