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

Issue or not?

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Old 01-15-16, 04:55 PM
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EazyRice1
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Unhappy Issue or not?

Hey guys, I don't if have real problem or just being paranoid. This started about 2 days ago. Before my car would start the warm up procedure at 1600 rpms, now it's 1900. It does go down after 2 minutes. It has been around 60 degrees outside. Any help would be deeply appreciated.
Old 01-15-16, 08:23 PM
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brybo86
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Vacuum leak? Open the hood and listen for hissing, spray carb cleaner around suspected cracks if idle increases there is your problem
Old 01-16-16, 01:18 AM
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sha4000
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1600 is even high. It should be around 1200. Check for leaks like it has already had been stated.
Old 01-16-16, 05:27 PM
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anesthesia
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Time to clean that throttle body build up of thick carbon
Old 01-16-16, 09:32 PM
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KJG92
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Originally Posted by anesthesia
Time to clean that throttle body build up of thick carbon
I agree with this.
Old 01-16-16, 11:29 PM
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EazyRice1
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Thanks for all the advice.
Old 01-18-16, 02:20 AM
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PureDrifter
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start and warm up rpm is dependent on temperature.

Generally, it'll idle higher when colder outside before settling at the same warm idle temp.
Old 01-18-16, 05:36 AM
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Stereorob
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its an old car. old cars do weird things. this is normal. on a cold start they normally idle high. mine sits at about 1500rpm for about 2 minutes too. mine has done this since I got it 3 years ago. no worries. and yeah I get a little paranoid about mine too. even though its been 100% reliable, Its getting too old to trust. I get it man.
Old 01-18-16, 07:07 AM
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sha4000
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Over the 13 years that i have owned my car no matter the temp that start up idle has been 1200rpm.
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