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Crosby and Aleisha

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  • First Name
    Michael

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  • Lexus Model
    LS400
  • Lexus Year
    1998
  • Location
    Oklahoma (OK)

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  1. What makes you say that. Just wondering. Because from other threads for iacv the problem is similar but not the same, they say when they start it they give it a little gas and it starts up I try it and it doesn't work. is it the throttle position sensor your thinking of.
  2. To be honest I don't know. I had o'reilys check it and the reader said two codes for O2 sensors and another about the immobilizer.
  3. Forgot to add that there is a cloud of smoke usually when it fires up the first time and then dies like usual. And the fuel gauge says about a quarter of a tank but the light is one and the eange says low fuel. When I bought it the car was below the empty mark. Maybe bad bad guel pump and sensor?
  4. So I purchased my 98 LS400 around three weeks ago. Ever since there's been a ongoing problem. Starting it and bad RPM's. It worked fine at first then. One day I went to start it after letting it sit for about seven hours and it started and died instantly. Tried again gave it gas and it ran fine. Read some about it people said clean the throttle body and iacv so I cleaned the throttle body not the iacv because I don't know where it is on the 1uzfe vvti I now where it is one the regular 1uzfe not in the same place since the throttle body was relocated to the front. After cleaning the throttle body it ran great for a day or two then I had to give it a little gas when it started. Then it would start after giving it a little gas the first time maybe it would fire up the second or third time. Now it's gotten so bad that I get in try it and it stalls remove the key and inject it and remove it once more and then try to start it. I'm trying to get fuel in the engine, because if I don't do this routine it just cranks and cranks. After several attempts it will fire up after more than five of these attempts. Ive notice that if it's a colder morning, sixty ish, it can start on the first go if I give it gas. And after running a little it just doesn't want to start like if it was warmer outside. Ive noticed a few other things, they might not be related. The security light does turn in when the car is unlocked and goes off when the key is injected so it's working I think. The touch screen and the clock turns off after the engine starts and resets the clock but not the radio settings. New battery and has had a recent oil change. Some of the vacuum hoses and either old or replaced. Power steering is out. And there is a brake problem. There was an engine light on but it's not know. Had it checked something about the immobilizer and the two o2 sensors. The timing belt was changed about 115,000 miles before the seller said. I have been putting premium gas in it. I'm not sure if the previous owner did or not. Should I check fuses, clean the idle air control valve (if so where is it located and what to use to clean it) or replace it. Make sure all vacuum lines are sealed. Replace the immobilizer and/or the o2 sensors. Or what do you guys think. I can't afford to take it to the mechanic. Anything helps.
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