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High Idle On Start Ls400


sizbob

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Could be your thermostat sticking open. Or a bad temperature sensor. How long does it take for the engine to warm to "normal" temperature? (also please specify your ambient temperature as well because that factors into the warmup time).

Man, thats low miles(100k) for a 95. Have you, or past owner, changed the original timing belt?

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pretty normal for a long period of high idle. I think normal is around 1600RPM's which gradually decreases to 600. I wouldn't consider it an issue but I understand your concern as I had the same one when I got my LS400 ten years ago.

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