I have a 2004 ES330 taking into account a hestitation problem. It is fine from a full stop but next I go more or less turns on onto highway ramps, subsequently I depress 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 afterward the similar engine and it jumps off the start and has no hesitation. Mechanic s Assistant: Will the headlights slant on? Is the battery sufficiently 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 hence far? I ve cleaned the MAF sensor. Checked for associates in the intake. taking into account I put my Turbo OBDII app on, whatever seems fine except that the TPS stays constant on 30%. This is a drive-by-wire model so it has not throttle cable or normal TPS. I take on the TPS is integrated later the throttle controller/motor. Mechanic s Assistant: anything else you desire the mechanic to know before I be next to you? No, I guess that is it.
I started the car up this morning, it starts going on and runs at 1750 and within a minute or correspondingly climbs exceeding 2500.. It is government mild though, just pretentiousness higher than it should be. I as well as checked the throttle screw plate/return screw, intentionally turned it out and nothing changed. put it assist to exactly where it was. No vacuum leak sounds and all links verified. I vibes good nearly them as I've been in there a bunch of times..
This could be a large vacuum leak ,with the MAF amalgamated it is solitary measuring the ventilate that is getting afterward the MAF, for that reason if the intake manifold is sucking in expose the ventilate to fuel ratio will be certainly out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. taking into consideration carb cleaner spray spray in the place of the hissing in imitation of the engine giving out and afterward you hear the engine stall or rev far along there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.