SFI SYSTEM (w/o Secondary Air Injection System) PROBLEM SYMPTOMS TABLE
Tech Tips
When a malfunction is not confirmed by a DTC (Diagnostic Trouble Code) check and the cause of problem cannot be identified through a basic inspection, troubleshoot according to the priority order indicated in the table below.
| Symptom | Suspected area | See page |
|---|---|---|
| Engine does not crank (Does not start) | 1. Starter | |
| 2. STARTER relay | ||
| No initial combustion (Does not start) | 1. ECM power source circuit | |
| 2. Fuel pump control circuit | ||
| 3. ECM | ||
| Engine cranks normally but difficult to start | 1. Fuel pump control circuit | |
| 2. Compression | ||
| Difficult to start with cold engine | 1. Starter signal circuit | |
| 2. Fuel pump control circuit | ||
| 3. Spark plug | ||
| 4. Ignition system | ||
| 5. Injector | ||
| Difficult to start with warm engine | 1. Starter signal circuit | |
| 2. Fuel pump control circuit | ||
| 3. Spark plug | ||
| 4. Ignition system | ||
| 5. Injector | ||
| High engine idling speed (Poor idling) | 1. A/C signal circuit (compressor circuit) | - |
| 2. ECM power source circuit | ||
| 3. Electronic throttle control system | ||
| 4. PCV hose | - | |
| Low engine idling speed (Poor idling) | 1. A/C signal circuit (compressor circuit) | - |
| 2. Fuel pump control circuit | ||
| 3. Electronic throttle control system | ||
| 4. PCV hose | - | |
| Rough idling (Poor idling) | 1. Compression | |
| 2. Fuel pump control circuit | ||
| 3. Electronic throttle control system | ||
| 4. PCV hose | - | |
| Hunting (Poor idling) | 1. ECM power source circuit | |
| 2. Fuel pump control circuit | ||
| 3. Spark plug | ||
| 4. Ignition system | ||
| 5. Injector | ||
| 6. Electronic throttle control system | ||
| 7. PCV hose | - | |
| Hesitation/Poor acceleration (Poor driveability) | 1. Fuel pump control circuit | |
| 2. A/T faulty* | ||
| 3. Spark plug | ||
| 4. Ignition system | ||
| 5. Injector | ||
| Surging (Poor driveability) | 1. Fuel pump control circuit | |
| 2. Spark plug | ||
| 3. Ignition system | ||
| 4. Injector | ||
| Engine stalls soon after starting | 1. Fule pump control circuit | |
| 2. Spark plug | ||
| 3. Ignition system | ||
| 4. Injector | ||
| Engine stall during A/C operation | 1. A/C signal circuit (Compressor circuit) | - |
| 2. ECM |