I have a 2004 ES330 past a hestitation problem. It is good from a full stop but afterward I go more or less turns on onto highway ramps, bearing in mind I pain 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 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 adequately charged? With or without headlights on. Relatively extra 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 correspondingly far? I ve cleaned the MAF sensor. Checked for contacts in the intake. in the manner of I put my Turbo OBDII app on, anything seems good except that the TPS stays constant on 30%. This is a drive-by-wire model thus it has not throttle cable or usual TPS. I assume the TPS is integrated next the throttle controller/motor. Mechanic s Assistant: anything else you want the mechanic to know before I be next to you? No, I guess that is it.
Its then worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a under the weather pump will every consequences in insufficient fuel brute delivered to the engine. Might next be worth cleaning out the idle swiftness control motor / valve as these acquire clogged going on as soon as carbon and some brake cleaner washed through helps free things off.
considering I start the car, the engine surges taking place amongst 1200 and 2000 rpm help and forth. I distorted the IAC and the TPS later no modify in symptoms. I have noticed that several Lexus SC's have this same issue. Prior to this I would have to adjust the idle enthusiasm screw to subjugate the rpm and it would maintain for a while. Now, the engine is continually surging to the dwindling where I cannot steer it for agitation of damage to the steer train. Any experienced solution?