Hissing sound from engine - Lexus IS Forum
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post #1 of 2 (permalink) Old 12-05-2018, 11:30 PM Thread Starter
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Hissing sound from engine

Car sounds like its hissing on and off while on
TaureanIS300 is offline  
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post #2 of 2 (permalink) Old 12-06-2018, 03:38 AM
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How many mileage, Got some electrical mods? Sound System? Can be your alternator that it is slowly dying
Use a Voltmeter to read the voltage at your battery while the car is idling, should be between 13.9 and 14.4V

2002 IS300 - Manual 5-speed LSD M85
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