Question about 1995 Lexus LS 400

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Lexus LS400 engine iddle

I have a 1995 Lexus LS400. When the engine is cold, it takes 5 minutes for the RPM to get down to normal level (around 800rpm). I have looked into an iddle sensor and have found the following. Is it one of these that I need and which one? Camshaft Position Sensor Crank Position Sensor
Water Temp Sensor For EFI

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This can be normal for the car. If the car starts shaking violently or is at an RPM over 2500 during the idle, then you have a problem but if it is lower still, then you should be fine. Cars will generally idle higher to warm up the engine and then return to a normal idle when it is cold. As long as this only happens in the cold, it probably is fine. If anything, go to an AutoZone and get the car scanned for free to see if any codes pop up.

Let me know what you find.


Benjamin

Posted on Feb 01, 2010

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Fast iddle speed when engine is cold.


This is acting normally then...

I guess it really depends on how cold it gets outside as well as how high the RPM's go...
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