I have a 2004 ES330 once a hestitation problem. It is fine from a full end but bearing in mind I go as regards turns on onto highway ramps, like 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 behind the similar engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights incline 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 so far? I ve cleaned the MAF sensor. Checked for contacts in the intake. when I put my Turbo OBDII app on, anything seems good except that the TPS stays constant more or less 30%. This is a drive-by-wire model consequently it has not throttle cable or normal TPS. I admit the TPS is integrated with the throttle controller/motor. Mechanic s Assistant: anything else you want the mechanic to know previously I connect 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 just about the problem history. It currently has a master tech qualified idle let breathe run valve and tps installed. without heartwarming anything, the last (used) ecu and my original, would rule in the car without this symptom.
This could be a large vacuum leak ,with the MAF partnered it is only measuring the freshen that is getting subsequently the MAF, correspondingly if the intake manifold is sucking in ventilate the freshen to fuel ratio will be definitely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. next carb cleaner spray vaporizer in the place of the hissing afterward the engine organization and gone you listen the engine stall or rev complex there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.