Symptom/Test Menu
NOTE:
Diagnosis by symptom should only be attempted after all codes have been cleared, but the problem still exists. Also refer to H - 4-CYL TESTS W/0 CODES article in this section.
DIAGNOSIS BY SYMPTOM MENU
| Symptom | Go To Test: (Step No.) | ||
|---|---|---|---|
| BACKFIRES | |||
| Vane Airflow Meter | DK (1) | ||
| Fuel Injectors | HA (4) | ||
| Idle Speed Control Solenoid | KE (1) | ||
| DIESELING (RUN-ON) | |||
| Idle Speed Control Solenoid | KE (1) | ||
| Fuel Injectors | HA (4) | ||
| LACK OF POWER | |||
| Vane Airflow Meter | DK (1) | ||
| Fuel Injectors | HA (4) | ||
| Wide Open Throttle Switch | FH (1) | ||
| Exhaust Gas Oxygen Sensor | HE (1) | ||
| Throttle Position Sensor | DH (1) | ||
| SPARK KNOCK (PINGING) | |||
| Vane Airflow Meter | DK (1) | ||
| STALLS/QUITS | |||
| Vane Airflow Meter | DK (1) | ||
| Fuel Injectors | HA (4) | ||
| Idle Speed Control Solenoid | KE (1) | ||
| Exhaust Gas Oxygen Sensor | HA (1), HE (1) | ||
| Engine Coolant Temperature Sensor | DE (1) | ||
| Radiator Temperature Switch | Q (1) | ||
| STUMBLE/HESITATION | |||
| Vane Airflow Meter | DK (1) | ||
| Fuel Injectors | HA (4) | ||
| Canister Purge Solenoid | KD (1) | ||
| Exhaust Gas Oxygen Sensor | HA (1), HE (1) | ||
| MISSES/SURGES | |||
| Exhaust Gas Oxygen Sensor | HA (1), HE (1) | ||
| Vane Airflow Meter | DK (1) | ||
| Engine Coolant Temperature Sensor | DE (1) | ||
| FAST IDLE | |||
| Idle Speed Control Solenoid | KE (1) | ||
| Engine Coolant Temperature Sensor | DE (1) | ||
| Electric Load Control Solenoid | FG (1) | ||
| ROUGH IDLE | |||
| Idle Speed Control Solenoid | KE (1) | ||
| Exhaust Gas Oxygen Sensor | HA (1), HE (1) | ||
| Vane Airflow Meter | DK (1) | ||
| Canister Purge Solenoid | KD (1) | ||
| Neutral Gear Switch Or Clutch Engage Switch | FA (1) | ||
| Exhaust Gas Oxygen Sensor | HA (1), HE (1) | ||
| Neutral Safety (Inhibitor) Switch | FB (1) | ||
| SPEEDS UP | |||
| Idle Speed Control Solenoid | KE (1) | ||
| Exhaust Gas Oxygen Sensor | HA (1), HE (1) | ||
| CRANKS BUT WON'T START | |||
| Ignition Diagnostic Monitor | A (1) | ||
| Vane Airflow Meter | DK (1) | ||
| Engine Coolant Temperature Sensor | DE (1) | ||
| Fuel Injectors | HA (4) | ||
| Vehicle Power | FC (1) | ||
| CRANKS BUT SLOW START | |||
| Engine Coolant Temperature Sensor | DE (1) | ||
| Radiator Temperature Switch | Q (1) | ||
| Vane Airflow Meter | DK (1) | ||
| Fuel Injectors | HA (4) | ||
| POOR FUEL ECONOMY | |||
| Exhaust Gas Oxygen Sensor | HA (1), HE (1) | ||
| Canister Purge Solenoid | KD (1) | ||
| Fuel Injectors | HA (4) | ||
| Vane Air Temperature Sensor | DA (1) | ||
| Vane Airflow Meter | DK (1) | ||
| EXHAUST SMOKE/ODOR | |||
| Fuel Injectors | HA (4) | ||
| Engine Coolant Temperature Sensor | DE (1) | ||
| Radiator Temperature Switch | Q (1) | ||
| Vane Air Temperature Sensor | DA (1) | ||
| Vane Airflow Meter | DK (1) | ||
| Exhaust Gas Oxygen Sensor | HA (1), HE (1) | ||
| FAILS EMISSION TEST | |||
| Fuel Injectors | HA (4) | ||
| Canister Purge Solenoid | KD (1) | ||
| Exhaust Gas Oxygen Sensor | HA (1), HE (1) | ||