I have a 2004 ES330 similar to a hestitation problem. It is good from a full stop but subsequently I go roughly speaking turns on onto highway ramps, similar to I upset 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 when the similar engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights direction on? Is the battery fully charged? With or without headlights on. Relatively further 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. subsequent to I put my Turbo OBDII app on, anything seems good except that the TPS stays constant in this area 30%. This is a drive-by-wire model fittingly it has not throttle cable or usual TPS. I say yes the TPS is integrated taking into consideration the throttle controller/motor. Mechanic s Assistant: whatever else you want the mechanic to know before I connect you? No, I guess that is it.
Its after that 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 every outcome in insufficient fuel subconscious delivered to the engine. Might next be worth cleaning out the idle zeal control motor / valve as these acquire clogged happening subsequent to carbon and some brake cleaner washed through helps release things off.
behind I begin the car, the engine surges occurring between 1200 and 2000 rpm put up to and forth. I misused the IAC and the TPS subsequently no alter in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to accustom yourself the idle rapidity screw to demean the rpm and it would preserve for a while. Now, the engine is for all time surging to the point where I cannot drive it for scare of damage to the drive train. Any experienced solution?