I have a 2004 ES330 later than a hestitation problem. It is good from a full end but gone I go in the region of turns on onto highway ramps, subsequent to I afflict the accellarator (sp?) it hesitates for 2 seconds past reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon taking into consideration the thesame engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights point of view 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 so far? I ve cleaned the MAF sensor. Checked for connections in the intake. subsequently I put my Turbo OBDII app on, anything seems fine except that the TPS stays constant on the subject of 30%. This is a drive-by-wire model therefore it has not throttle cable or normal TPS. I acknowledge the TPS is integrated next the throttle controller/motor. Mechanic s Assistant: all else you desire the mechanic to know before I be close 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 all upshot in insufficient fuel visceral delivered to the engine. Might next be worth cleaning out the idle speed direct motor / valve as these acquire clogged stirring once carbon and some brake cleaner washed through helps free things off.
This could be a large vacuum leak ,with the MAF linked it is isolated measuring the expose that is getting like the MAF, thus if the intake manifold is sucking in let breathe the let breathe to fuel ratio will be utterly out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. behind carb cleaner spray vaporizer in the place of the hissing next the engine government and bearing in mind you hear the engine stall or rev unconventional there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.