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I have a 2003 RX 300 FWD with 93K miles.Frequently it won't start without pressing the gas peddle down half way. It starts,but won't hold an idle without working the gas peddle till it warms up.Then it runs normal.Gas mileage has dropped from 20 to 16 MPG.All maintenance is up to date.Has original spark plugs.had injectors cleaned and O2 sensors replaced.Thank you.
Country: United StatesMake: LexusModel: RX300Year: 2003Engine: V6
I'm Neal and I am here to assist you. Only accept when you are happy with my assistance. If I can't help I will open your Question to other experts.
When does it seem to do this? Is there a pattern?
It happens mostly in AM and after work.Has become a daily thing over last 2 weeks.
One thing that can happen is the fuel injectors can slowly leak down and flood the engine, Usually if they are leaking just a little it can take hours before it will be enough for you to notice. Having to hold the throttle open lets in more air and helps a flooded engine start. I would have the injectors checked.
Experience: Shop owner experienced in most brands.