AVAILABLE TROUBLE SHOOTING HEADINGS
- No Start - Cold Engine
- Starts But Stalls - Cold Engine
- Hard To Start - Cold Engine
- No Start - Warm Engine
- Erratic Idle - Warm-Up
- Backfiring
- Incorrect Idle Speed
- Hesitation - Acceleration
- Hesitation - Coasting
- Knocking
- Engine Misfire
- Insufficient Engine Power
- Poor Fuel Economy
- Excessive HC and NOx
INTERMITTENT PROBLEM DIAGNOSIS
Intermittent fault testing requires duplicating circuit or component failure to identify the problem. These procedures may lead to the computer setting a fault code (on some systems) which may help in diagnosis.
If problem vehicle does not produce fault codes, monitor voltage or resistance values using a DVOM while attempting to reproduce conditions causing intermittent fault. A status change on DVOM indicates a fault has been located.
Use a DVOM to pinpoint faults. When monitoring voltage, ensure ignition switch is in ON position or engine is running. Ensure ignition switch is in OFF position or negative battery cable is disconnected when monitoring circuit resistance. Status changes on DVOM during test procedures indicate area of fault.
See also:
• ADJUSTMENTS