Problem Symptoms Table
HINT:
- Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
SFI SYSTEM
| Symptom | Suspected Area | Rererence |
|---|---|---|
| Engine does not crank (Does not start) | Battery | - |
| Starter | Refer to INSPECTION | |
| Starter relay | Refer to ON-VEHICLE INSPECTION - Step 1 | |
| Park/neutral position switch | Refer to INSPECTION - Step 1 | |
| Clutch start switch | Refer to INSPECTION | |
| No initial combustion (Does not start) | ECM power source circuit | Refer to ECM Power Source Circuit |
| Crankshaft position sensor | Refer to INSPECTION PROCEDURE | |
| Camshaft position sensor | Refer to INSPECTION PROCEDURE | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| Fuel injector circuit | Refer to Fuel Injector Circuit | |
| Valve timing | Refer to PROCEDURE - Step 4 | |
| VC output circuit | Refer to VC Output Circuit | |
| ECM | Refer to REMOVAL | |
| Engine cranks normally but difficult to start | Fuel pump control circuit | Refer to Fuel Pump Control Circuit |
| Fuel pump | Refer to INSPECTION - Step 1 | |
| Fuel injector circuit | Refer to Fuel Injector Circuit | |
| ECM power source circuit | Refer to ECM Power Source Circuit | |
| Engine coolant temperature sensor | Refer to INSPECTION PROCEDURE | |
| Air induction system | Refer to ON-VEHICLE INSPECTION - Step 1 | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Spark plug | Refer to ON-VEHICLE INSPECTION - Step 2 | |
| Throttle body | Refer to INSPECTION PROCEDURE | |
| Compression | Refer to ON-VEHICLE INSPECTION - Step 9 | |
| Incomplete intermittent combustion occurs (Does not start) | Fuel pump control circuit | Refer to Fuel Pump Control Circuit |
| Fuel pump | Refer to INSPECTION - Step 1 | |
| Ignition circuit | Refer to INSPECTION PROCEDURE | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Fuel injector circuit | Refer to Fuel Injector Circuit | |
| ECM power source circuit | Refer to ECM Power Source Circuit | |
| Crankshaft position sensor | Refer to INSPECTION PROCEDURE | |
| Camshaft position sensor | Refer to INSPECTION PROCEDURE | |
| Valve timing | Refer to PROCEDURE - Step 4 | |
| High engine idle speed | Throttle body | Refer to INSPECTION PROCEDURE |
| Air induction system | Refer to ON-VEHICLE INSPECTION - Step 1 | |
| A/C signal circuit | - | |
| ECM power source circuit | Refer to ECM Power Source Circuit | |
| Engine coolant temperature sensor | Refer to INSPECTION PROCEDURE | |
| PCV valve and hose | Refer to INSPECTION - Step 1 | |
| Low engine idle speed (Poor idling) | Throttle body | Refer to INSPECTION PROCEDURE |
| A/C signal circuit | - | |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| Fuel pump | Refer to INSPECTION - Step 1 | |
| Air induction system | Refer to ON-VEHICLE INSPECTION - Step 1 | |
| PCV valve and hose | Refer to INSPECTION - Step 1 | |
| Rough idling | Compression | Refer to ON-VEHICLE INSPECTION - Step 9 |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Spark plug | Refer to ON-VEHICLE INSPECTION - Step 2 | |
| Fuel injector circuit | Refer to Fuel Injector Circuit | |
| ECM power source circuit | Refer to ECM Power Source Circuit | |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| Fuel pump | Refer to INSPECTION - Step 1 | |
| Throttle body | Refer to INSPECTION PROCEDURE | |
| Air induction system | Refer to ON-VEHICLE INSPECTION - Step 1 | |
| PCV valve and hose | Refer to INSPECTION - Step 1 | |
| Air fuel ratio sensor | Refer to INSPECTION PROCEDURE | |
| Heated oxygen sensor | Refer to INSPECTION PROCEDURE | |
| Mass air flow meter | Refer to PROCEDURE - Step 6 | |
| Idle hunting | Throttle body | Refer to INSPECTION PROCEDURE |
| Air induction system | Refer to ON-VEHICLE INSPECTION - Step 1 | |
| PCV valve and hose | Refer to INSPECTION - Step 1 | |
| Air fuel ratio sensor | Refer to INSPECTION PROCEDURE | |
| Mass air flow meter | Refer to PROCEDURE - Step 6 | |
| Hesitation/Poor acceleration | Fuel pump control circuit | Refer to Fuel Pump Control Circuit |
| Fuel pump | Refer to INSPECTION - Step 1 | |
| Spark plug | Refer to ON-VEHICLE INSPECTION - Step 2 | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Fuel injector circuit | Refer to Fuel Injector Circuit | |
| ECM power source circuit | Refer to ECM Power Source Circuit | |
| Mass air flow meter | Refer to PROCEDURE - Step 6 | |
| Throttle body | Refer to INSPECTION PROCEDURE | |
| Air induction system | Refer to ON-VEHICLE INSPECTION - Step 1 | |
| Valve timing | Refer to PROCEDURE - Step 4 | |
| Compression | Refer to ON-VEHICLE INSPECTION - Step 9 | |
| Surging (Poor driveability) | Spark plug | Refer to ON-VEHICLE INSPECTION - Step 2 |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| Fuel pump | Refer to INSPECTION - Step 1 | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Fuel injector circuit | Refer to Fuel Injector Circuit | |
| ECM power source circuit | Refer to ECM Power Source Circuit | |
| Mass air flow meter | Refer to PROCEDURE - Step 6 | |
| Variable valve timing (VVT) system | Refer to INSPECTION PROCEDURE | |
| Compression | Refer to ON-VEHICLE INSPECTION - Step 9 | |
| Engine stalls soon after starting | Fuel pump control circuit | Refer to Fuel Pump Control Circuit |
| Fuel pump | Refer to INSPECTION - Step 1 | |
| Spark plug | Refer to ON-VEHICLE INSPECTION - Step 2 | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Fuel injector circuit | Refer to Fuel Injector Circuit | |
| ECM power source circuit | Refer to ECM Power Source Circuit | |
| Mass air flow meter | Refer to PROCEDURE - Step 6 | |
| Variable valve timing (VVT) system | Refer to INSPECTION PROCEDURE | |
| Throttle body | Refer to INSPECTION PROCEDURE | |
| Air induction system | Refer to ON-VEHICLE INSPECTION - Step 1 | |
| PCV valve and hose | Refer to INSPECTION - Step 1 | |
| Compression | Refer to ON-VEHICLE INSPECTION - Step 9 | |
| Engine stalls only during A/C operation | A/C signal circuit | - |
| ECM | Refer to REMOVAL | |
| Unable/difficult to refuel | Refueling valve (canister) | Refer to INSPECTION - Step 1 |