Section 1 (Engine Controls - Tests W/Codes - 2.6L): Summary
WARNING: This page is about a different car, the 1990 Isuzu Trooper, 1990 Isuzu Pickup, and 1990 Isuzu Amigo. However, it is still accessible from the selected car via links, so may be relevant.
If no hard fault codes (or only pass codes) are present, driveability symptoms exist or intermittent codes exist, proceed to H - TESTS W/O CODE (F INJ) article for diagnosis by symptom (i.e. ROUGH IDLE, NO START, etc.) or intermittent diagnosis procedures.