I have a 2004 ES330 in the manner of a hestitation problem. It is good from a full end but similar to I go regarding turns on onto highway ramps, in the same way as 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 considering the same engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights direction on? Is the battery fully 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 suitably far? I ve cleaned the MAF sensor. Checked for connections in the intake. subsequently I put my Turbo OBDII app on, anything seems fine except that the TPS stays constant on the order of 30%. This is a drive-by-wire model appropriately it has not throttle cable or usual TPS. I tolerate the TPS is integrated once the throttle controller/motor. Mechanic s Assistant: whatever else you desire the mechanic to know back I affix you? No, I guess that is it.
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I did re-check them tho. The master tech did extensive tests on the let breathe flow meter and said it was good. once I unplug it and run the motor, the car runs scratchy and at 850ish. I can abandoned guess that my other rebuilt ecu has an issue, or the tps needs to be re-adjusted, or someway my maf has died in the midst of every this. I don't think the tps has that much govern in the substitute of rpm though? I think it solitary adjusts it just about 1k..
This could be a large vacuum leak ,with the MAF amalgamated it is on your own measuring the air that is getting as soon as the MAF, as a result if the intake manifold is sucking in air the let breathe 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. past carb cleaner vaporizer spray in the area of the hissing with the engine government and bearing in mind you listen the engine stall or rev higher there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.
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