Symptom Diagnosis
Symptom checks cannot be used properly unless the problem is actually happening while the vehicle is being tested. To reduce diagnostic time, ensure battery voltage is okay and starter motor turns engine over before attempting to diagnose a symptom.
Check engine mechanical condition (compression pressure, valve timing, etc.), wiring harness and connections (terminals not corroded or pushed back), and vacuum hose (not disconnected or leaking).
Also check for correct tire sizes, as recommended by manufacturer. Ensure wheels rotate freely (brake drag or bad wheel bearings). Ensure no speed reducing accessories are installed. Symptoms available for diagnosis include the following.
- Engine Does Not Start Or Is Difficult To Start When Cold
- Engine Does Not Start Or Is Difficult To Start When Warm
- Uneven Idle Or No Idle With Cold Engine Or During Warm-Up
- Engine Starts But Stalls
- Idle Speed Exceeds Specification
- Poor Acceleration With Cold Engine Or During Warm-Up
- Engine Stalls While Driving
- Poor Performance
- Engine Run-On (Dieseling)
- High Fuel Consumption
- Engine Knock
- Engine Runs Unevenly Over Entire Speed Range
NOTE:
Symptoms listed are for CIS-E Motronic system. When working on Digifant and Motronic systems, use symptoms listed only as a diagnostic guide. A list of specific symptoms for Digifant and Motronic systems is not available from manufacturer.