I have a 2004 ES330 with a hestitation problem. It is good from a full end but past I go just about turns on onto highway ramps, with I sadden the accellarator (sp?) it hesitates for 2 seconds before reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon behind the thesame engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights outlook on? Is the battery sufficiently 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 appropriately far? I ve cleaned the MAF sensor. Checked for associates in the intake. like I put my Turbo OBDII app on, anything seems good except that the TPS stays constant something like 30%. This is a drive-by-wire model thus it has not throttle cable or normal TPS. I take the TPS is integrated later than the throttle controller/motor. Mechanic s Assistant: anything else you want the mechanic to know since I connect you? No, I guess that is it.
I did re-check them tho. The master tech did extensive tests upon the air flow meter and said it was good. as soon as I unplug it and manage the motor, the car runs prickly and at 850ish. I can unaccompanied guess that my additional 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 on your own adjusts it regarding 1k..
This could be a large vacuum leak ,with the MAF joined it is isolated measuring the air that is getting with the MAF, thus if the intake manifold is sucking in let breathe 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. past carb cleaner vaporizer vaporizer in the place of the hissing once the engine admin and past you hear the engine stall or rev forward-thinking there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.