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LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

help, engine still running poorly ('98 LS)

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Old Nov 1, 2006 | 01:48 AM
  #16  
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lol, you know what i mean by "cold"

59F is considered cold around here

im pretty sure there HAS to be a way to adjust the idle on a UCF21, this is something il look into. (anyone have a 98-00 LS repair manual i can browse thru pls )
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Old Nov 1, 2006 | 06:09 AM
  #17  
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my timing was changed at 90k, at least, that is what i was told when i bought the car. i now have 148k
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Old Jan 12, 2007 | 04:32 PM
  #18  
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ok, so.... the problem had NOTHING to do with ignition or air/fuel mixture. I finally took the car to the dealer and they told me I have a broken motor mount, with the other one getting close to breaking. They suggested replacing both motor mounts as well as the tranny mount... for $850. Alot of money, but will be nice to have a smooth running ls again.
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