I have a 2004 ES330 taking into consideration a hestitation problem. It is good from a full end but bearing in mind I go a propos turns upon onto highway ramps, past I pain the accellarator (sp?) it hesitates for 2 seconds before reving up. I ve taken it to a mechanic and he says it is normal. I have an 2003 Avalon later the similar engine and it jumps off the begin and has no hesitation. Mechanic s Assistant: Will the headlights face 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 so far? I ve cleaned the MAF sensor. Checked for connections in the intake. considering I put my Turbo OBDII app on, whatever seems good except that the TPS stays constant not far off from 30%. This is a drive-by-wire model thus it has not throttle cable or normal TPS. I acknowledge the TPS is integrated subsequently the throttle controller/motor. Mechanic s Assistant: all else you desire the mechanic to know previously I affix 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 outcome in insufficient fuel brute delivered to the engine. Might in addition to be worth cleaning out the idle speed run motor / valve as these get clogged taking place past carbon and some brake cleaner washed through helps free things off.
This could be a large vacuum leak ,with the MAF joined it is deserted measuring the freshen that is getting similar to the MAF, as a result if the intake manifold is sucking in expose the ventilate to fuel ratio will be no question out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. bearing in mind carb cleaner vaporizer spray in the area of the hissing once the engine processing and taking into account you listen the engine stall or rev higher there is the leak ,could be a bad vacuum hose bad gasket on the manifold.