I have a 2004 ES330 subsequent to a hestitation problem. It is good from a full stop but subsequently I go roughly speaking turns on onto highway ramps, considering I pain 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 taking into consideration the similar engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights position on? Is the battery sufficiently 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 suitably far? I ve cleaned the MAF sensor. Checked for friends in the intake. afterward I put my Turbo OBDII app on, whatever seems good except that the TPS stays constant re 30%. This is a drive-by-wire model correspondingly it has not throttle cable or usual TPS. I take on the TPS is integrated later than the throttle controller/motor. Mechanic s Assistant: whatever else you desire 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 on the air flow meter and said it was good. past I unplug it and govern the motor, the car runs rasping and at 850ish. I can abandoned guess that my new rebuilt ecu has an issue, or the tps needs to be re-adjusted, or someway my maf has died in the midst of all this. I don't think the tps has that much govern in the vary of rpm though? I think it unaccompanied adjusts it just about 1k..
This could be a large vacuum leak ,with the MAF similar it is solitary measuring the freshen that is getting in the manner of the MAF, thus if the intake manifold is sucking in ventilate the expose 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. following carb cleaner spray vaporizer in the place of the hissing considering the engine executive and past you hear the engine stall or rev higher there is the leak ,could be a bad vacuum hose bad gasket on the manifold.