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

Low idle 99 LS, but no CEL

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Old 12-19-17, 09:52 AM
  #16  
timmy0tool
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This recently happened to me, so to bump up the idle a bit I turned on the A/C (you can run the heater simultaneously too if you're cold).
now of course that's not a fix but after a few miles the car adjusted and it was not as low when I turned off the A/C. this was on my 97 with 170k.
Old 12-20-17, 01:29 AM
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PureDrifter
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Originally Posted by lexus_ls
It was in drive.

Thanks.
That would be your problem.

Take a picture of the car in neutral or drive.
Old 01-10-18, 09:12 PM
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lexus_ls
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This is in N which idles the same in P.



and in drive.


So far I have cleaned the airmix, replace throttle position sensor, idle motor, checks vac leaks, cleaned throttle body 4 times ( wasnt even dirty ) I changed the battery as well as some reported better idle. I have also had my ECU rebuilt, but that didnt do anything. I'm out of ideas to what it could be. Please help.
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