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Home >> Jeep >> 1990 >> Wagoneer >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.5L >> Introduction

Engine Controls - Tests W/Codes - 2.5L: Introduction

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If no faults were found while performing BASIC TESTING , proceed with SELF-DIAGNOSTICS. If no fault codes or only pass codes are present after entering self-diagnostics, proceed to TESTS W/O CODES article for diagnosis by symptom (i.e. ROUGH IDLE, NO START, etc.).