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LS400Joe

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    stillwelljoe

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  • Lexus Model
    LS400

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  1. There is a section in the owers manual for 98-00 LS400's on how to reset the VSC - I had to follow the procedure recently when I changed my battery. If the light went off, that is great but Autozone guy was apparently not familier with the process. I've gone through a whole bunch of batteries in the 18 years I have been driving Lexus LS cars. Almost every time the first sign of failure has been the engine dying - most often when rounding a low speed curve or hitting a bump. My indie repair shop owner - a former Lexus service writer - thinks a connection between battery cells fails and gets temporarilly disconnected while driving. I too have almost always been able to restart the car and drive until the car dies again. Now when it happens, I don't bother to have the battery or electrical system checked but simply pop in a new battery. Coincidentally, the last battery I replaced (an Interstate) also lasted only about one year. This time, I installed a battery from Walmart - they had several that fit but I got the largest dimension one with the most cranking power. Aside from what wwest said, Lexus dealers usually have lots of well trained, competent mechanics that have seen just about everything that can go wrong with Lexus vehicles -- something you are not going to find at an Autozone or other low budget garage. Look for an indie garage that specializes in Lexus and get to know the owner and mechanics. For me doing that has resulted in getting much better service and somewhat lower prices on repairs and maintenence. Good luck! Hi I have a 98 LS400 with the same issue. Did you fix your issue? mine dies when i turn corners at low RPM's and then will start right up again. Any help would be appreciated. Thanks, JoeLS400 Found my issue. When the Timing belt was changed, it was not put back together correctly. Apparently there is a timing Sprocket that is attahed to the crank. This sprocket has 34 teeth that register with the Crank sensor. When the car was idleing, the sprocket would wobble out of range of the sensor. When the car had RPM's of over 1000, the sprocket would suck into place. I took the car to the Dealer and they were able to diagnose the issue. This is what I get for taking it to a cheap garage for the timing belt replacement. The Fix was labor to tear down the front of the motor and tighten the sprocket in place. $600 and some change. I hope this helps. LS400Joe
  2. Jason, I have a LS400 that is getting the same codes. Did you fix your issue? Please let me know joels400
  3. Sounds like your throttle position sensor. If it is adjusted too high, your RPM will jump as you have stated. You can try adjusting it. Look at similar postings on how to adjust. Good Luck LS400Joe
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