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Home >> Mercury >> 1991 >> Topaz LS, 2.3 S >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.3L >> Quick Test >> Visual Check & Vehicle Preparation

Visual Check & Vehicle Preparation

Complete all steps in BASIC TESTING article before proceeding to next test step. Ensure vacuum hoses are connected correctly and EEC-IV wiring harnesses are connected.