Question about 2000 Lexus RX 300
After letting my 2000, 300 rx warm up for several minutes. I drive to where i am going and when i reach 30 mph i start to hear a siren like sound. It sounds like it is coming from some where in the front part of the car. Where i have no idea because i can only hear it when I am driving. I have had my check engine light come on twice in the last 3 weeks but i goes out after i start my car for about the 5th time. I don't have a clue what it might be im not to familiar with cars
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Posted on Jan 02, 2017
SOURCE: all dash warning lights came
You're alternator has gone bad and the vehicle was running on battery power. The "clicking" sound is your now dead battery that does not have enough power to turn over the starter. You might also want to check your power steering pump for leak. This is a know problem with early LS400s and will most likey be the cause of the alternator failure. I just dropped $1050.00 to fix the very same promblems you have.
Posted on Jul 21, 2008
#4 Miss-fire. All the things you are saying make a lot of sense. When the light is blinking the cylinder is actualy misfiring, & the smell you are smelling is the fuel that is not burning in the engine burning in the exahst. This can cause a lot of damage to the exausht if it is not repaired..
There is still a couple of things that need to be checked, first he needs to check to see if it is possibly a fuel injector that is sticking. He can do this easily by moving the #4 injector to another cylinder & run the car. When it starts missfiring he will need to see if it is still #4 or if it is the cylinder that he moved the injector to. if it is the new cylinder it is obviously the injector, if it is still #4 he will need to look into the possibility of the EGR valve sticking open or some other issue to do with valve timing or low compression.
I hope this helps
Posted on Mar 17, 2009
You replaced the wrong sensor. Here is a link that can further explain how to trouble shoot this problem http://us.lexusownersclub.com/forums/lofiversion/index.php/t14194.html
Check for Vacuum hose for leak,crack or blocked first then, Vacuum switch Valves for vapor pressure sensor next to the Evaporator Charcoal Canister rear of the fuel tank. Charcoal Canister crack or damage. But mostly likely Charcoal Canister and vapor pressure sensor replacment. Tell us the result.
Posted on Feb 20, 2010
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