SFI SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, 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.
| Symptom | Suspected Area | See page |
|---|---|---|
| Engine does not crank (Does not start) | Battery | |
| Starter | ||
| Starter relay | ||
| Park/neutral position switch | ||
| Clutch start switch | ||
| Entry and start system | ||
| No initial combustion (Does not start) | ECM power source circuit | |
| Crankshaft position sensor | ||
| Ignition system | ||
| Fuel pump control circuit | ||
| ECM | ||
| Starter signal circuit | ||
| VC output circuit | ||
| Immobiliser system (w/ Entry and Start System) | ||
| Immobiliser system (w/o Entry and Start System) | ||
| Valve rocker arm* | - | |
| Engine cranks normally but difficult to start | Fuel pump control circuit | |
| Compression | ||
| Starter signal circuit | ||
| ECM power source circuit | ||
| Valve rocker arm* | - | |
| Difficult to start with cold engine | Ignition system | |
| Spark plug | ||
| Fuel pump control circuit | ||
| Fuel injector assembly | ||
| Difficult to start with warm engine | Fuel injector assembly | |
| Ignition system | ||
| Spark plug | ||
| Fuel pump control circuit | ||
| High engine idle speed | Electronic throttle control system | |
| A/C signal circuit (for automatic air conditioning system) | ||
| A/C signal circuit (for manual air conditioning system) | ||
| ECM power source circuit | ||
| Low engine idle speed (Poor idling) | Electronic throttle control system | |
| A/C signal circuit (for automatic air conditioning system) | ||
| A/C signal circuit (for manual air conditioning system) | ||
| Fuel pump control circuit | ||
| Air induction system (w/ Secondary Air Injection System) | ||
| Air induction system (w/o Secondary Air Injection System) | ||
| PCV hose (w/ Secondary Air Injection System) | ||
| PCV hose (w/o Secondary Air Injection System) | ||
| Rough idling | Compression | |
| Spark plug | ||
| Fuel injector assembly | ||
| Ignition system | ||
| Fuel pump control circuit | ||
| Electronic throttle control system | ||
| Air induction system (w/ Secondary Air Injection System) | ||
| Air induction system (w/o Secondary Air Injection System) | ||
| PCV hose (w/ Secondary Air Injection System) | ||
| PCV hose (w/o Secondary Air Injection System) | ||
| Mass air flow meter | ||
| Valve rocker arm* | - | |
| Idle hunting | Electronic throttle control system | |
| Air induction system (w/ Secondary Air Injection System) | ||
| Air induction system (w/o Secondary Air Injection System) | ||
| ECM power source circuit | ||
| Hesitation/poor acceleration | Fuel pump control circuit | |
| Spark plug | ||
| Ignition system | ||
| Fuel injector assembly | ||
| Mass air flow meter | ||
| Electronic throttle control system | ||
| Air induction system (w/ Secondary Air Injection System) | ||
| Air induction system (w/o Secondary Air Injection System) | ||
| Compression | ||
| Brake override system | ||
| Valve rocker arm* | - | |
| Surging (Poor driveability) | Spark plug | |
| Fuel pump control circuit | ||
| Ignition system | ||
| Fuel injector assembly | ||
| Mass air flow meter | ||
| Variable valve timing system | ||
| Compression | ||
| Valve rocker arm* | - | |
| Engine stalls soon after starting | Fuel pump control circuit | |
| Spark plug | ||
| Ignition system | ||
| Fuel injector assembly | ||
| Variable valve timing system | ||
| Electronic throttle control system | ||
| Air induction system (w/ Secondary Air Injection System) | ||
| Air induction system (w/o Secondary Air Injection System) | ||
| PCV hose (w/ Secondary Air Injection System) | ||
| PCV hose (w/o Secondary Air Injection System) | ||
| Compression | ||
| Valve rocker arm* | - | |
| Engine stalls only during A/C operation | A/C signal circuit (for automatic air conditioning system) | |
| A/C signal circuit (for manual air conditioning system) | ||
| ECM |
Tech Tips
*: Check "Fuel Cut Elps Time" in the Data List. If the elapsed time is over 0 sec, then the engine speed is high (More than the engine speed at which fuel cut occurs + 500 rpm). When this has happened, there is a possibility that the valve rocker arm will become loose and malfunction, so check that the valve rocker arm is properly attached Click here.