Mike's Workshop Manuals
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Lexus
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1992
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SC 400
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Tests W/O Codes
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Diagnosis By Symptom
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Poor DRIVEABILITY
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Surging
Poor DRIVEABILITY: Surging
Check switch condition signal. See CODE 51 in TESTS W/CODES article in the ENGINE PERFORMANCE Section.
Check fuel pump control circuit.
Check distributor.
Check spark plugs.
Check injector circuit.