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

Engine rough

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Old 06-19-17, 04:04 PM
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jsp973
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Default Engine rough

Engine runs very rough at 2000-2400 rpm, test module say ok and no engine light
Old 06-22-17, 09:57 AM
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timmy0tool
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please state the year and mileage of your vehicle.
Old 06-23-17, 11:37 PM
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dicer
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Racing cam?
Old 06-24-17, 04:12 AM
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Yamae
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Originally Posted by jsp973
Engine runs very rough at 2000-2400 rpm, test module say ok and no engine light
I'd check the transmission mount first because the lowest resonance frequency of the transmission line is around 36Hz which is 2160rpm.
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