If no faults were found while performing BASIC TESTING, proceed with DIAGNOSTIC PROCEDURE under SELF-DIAGNOSTIC SYSTEM. Failure to do so may result in lost diagnostic time. Before considering the computer system as a possible cause of problems, perform checks and inspections covered in BASIC TESTING j article in this section. Most engine control problems are the result of mechanical breakdowns, poor electrical connections or damaged vacuum hoses. Buick LeSabre Limited 1994 - 1994 ENGINE PERFORMANCE Self-Diagnostics - Tests W/Codesīuick LeSabre Limited 1994 - INTRODUCTION
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