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

High idle at start up lasts longer than it should

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Old 03-20-15, 07:38 PM
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dicer
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Default High idle at start up lasts longer than it should

1990, after starting high idle stayed at about 1500 rpms for about 15 minutes.
I disconnected the battery today to work on radio and climate control stuff.
When I started it (sitting all week) I noticed after 3 or so minutes the idle was in normal range.
So the ECU must have had some past transient thing happen and reset fixed it. Just something to try when your having idling problems.
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