I have a 2004 ES330 subsequent to a hestitation problem. It is good from a full end but in imitation of I go approximately turns on onto highway ramps, following I afflict the accellarator (sp?) it hesitates for 2 seconds previously reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon following 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 abundantly 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 correspondingly far? I ve cleaned the MAF sensor. Checked for connections in the intake. subsequent to I put my Turbo OBDII app on, anything seems fine except that the TPS stays constant vis--vis 30%. This is a drive-by-wire model appropriately it has not throttle cable or normal TPS. I give a positive response the TPS is integrated taking into consideration the throttle controller/motor. Mechanic s Assistant: everything else you desire the mechanic to know before I affix you? No, I guess that is it.
I started the car taking place this morning, it starts occurring and runs at 1750 and within a minute or hence climbs over 2500.. It is government smooth though, just mannerism highly developed than it should be. I with checked the throttle screw plate/return screw, purposefully turned it out and nothing changed. put it help to exactly where it was. No vacuum leak sounds and all associates verified. I air fine nearly them as I've been in there a bunch of times..
This could be a large vacuum leak ,with the MAF combined it is unaided measuring the let breathe that is getting in imitation of the MAF, thus if the intake manifold is sucking in expose the ventilate 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. next carb cleaner spray spray in the place of the hissing next the engine dispensation and subsequent to you hear the engine stall or rev well along there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.