I have a 2004 ES330 similar to a hestitation problem. It is good from a full end but taking into consideration I go all but turns on onto highway ramps, following I pain the accellarator (sp?) it hesitates for 2 seconds 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 start and has no hesitation. Mechanic s Assistant: Will the headlights slant on? Is the battery thoroughly charged? With or without headlights on. Relatively new 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 associates in the intake. past I put my Turbo OBDII app on, all seems fine except that the TPS stays constant nearly 30%. This is a drive-by-wire model correspondingly it has not throttle cable or usual TPS. I say yes the TPS is integrated past the throttle controller/motor. Mechanic s Assistant: anything else you want the mechanic to know before I be close to you? No, I guess that is it.
I did re-check them tho. The master tech did extensive tests upon the let breathe flow meter and said it was good. taking into consideration I unplug it and direct the motor, the car runs gruff and at 850ish. I can by yourself guess that my extra 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 vary of rpm though? I think it forlorn adjusts it almost 1k..
This could be a large vacuum leak ,with the MAF connected it is deserted measuring the ventilate that is getting in imitation of the MAF, so if the intake manifold is sucking in ventilate the expose to fuel ratio will be unquestionably out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. subsequent to carb cleaner spray can spray in the place of the hissing afterward the engine running and subsequent to you listen the engine stall or rev sophisticated there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.