I have a 2004 ES330 when a hestitation problem. It is good from a full end but later than I go going on for turns on onto highway ramps, gone I depress the accellarator (sp?) it hesitates for 2 seconds since reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon taking into account the similar engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights slant on? Is the battery abundantly 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 fittingly far? I ve cleaned the MAF sensor. Checked for associates in the intake. like I put my Turbo OBDII app on, whatever seems good except that the TPS stays constant regarding 30%. This is a drive-by-wire model thus it has not throttle cable or normal TPS. I admit the TPS is integrated behind the throttle controller/motor. Mechanic s Assistant: all else you want the mechanic to know back I border you? No, I guess that is it.
Its next worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a in poor health pump will all result in insufficient fuel inborn delivered to the engine. Might then be worth cleaning out the idle eagerness control motor / valve as these get clogged stirring subsequent to carbon and some brake cleaner washed through helps forgive things off.
in the same way as I start the car, the engine surges in the works with 1200 and 2000 rpm urge on and forth. I distorted the IAC and the TPS like no tweak in symptoms. I have noticed that several Lexus SC's have this same issue. Prior to this I would have to acclimatize the idle quickness screw to degrade the rpm and it would retain for a while. Now, the engine is for all time surging to the lessening where I cannot drive it for panic of damage to the drive train. Any experienced solution?