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.
-
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | See page |
|---|---|---|
| Engine does not crank (Does not start) | Battery | |
| Starter Assembly | ||
| Starter Relay | ||
| VC Output Circuit | ||
| No initial combustion (Does not start) | ECM Power Source Circuit | |
| Crankshaft Position Sensor | ||
| Camshaft Position Sensor | ||
| Ignition System | ||
| Fuel Pump Control Circuit | ||
| Fuel Injector Circuit | ||
| ECM | ||
| VC Output Circuit | ||
| Starter Signal Circuit | ||
| Engine Immobiliser System | ||
| Engine cranks normally but has difficulty starting | Fuel Pump Control Circuit | |
| Engine Coolant Temperature Sensor | ||
| Ignition System | ||
| Compression | ||
| Fuel Injector Assembly | ||
| Fuel Injector Circuit | ||
| Intake System | - | |
| Throttle Body Assembly | ||
| PCV Hose | ||
| Starter Signal Circuit | ||
| ECM Power Source Circuit | ||
| Difficult to start with cold engine | Ignition System | |
| Spark Plug | ||
| Fuel Pump Control Circuit | ||
| Fuel Injector Assembly | ||
| Starter Signal Circuit | ||
| Difficult to start with warm engine | Fuel Injector Assembly | |
| Ignition System | ||
| Spark Plug | ||
| Fuel Pump Control Circuit | ||
| Starter Signal Circuit | ||
| High engine idle speed | Electronic Throttle Control System | |
| A/C Signal Circuit | ||
| ECM Power Source Circuit | ||
| Low engine idle speed (Poor idling) | Electronic Throttle Control System | |
| A/C Signal Circuit | ||
| Fuel Pump Control Circuit | ||
| Intake System | - | |
| PCV Hose | ||
| Rough idling | Compression | |
| Spark Plug | ||
| Fuel Injector Assembly | ||
| Ignition System | ||
| Fuel Pump Control Circuit | ||
| Electronic Throttle Control System | ||
| Intake System | - | |
| PCV Hose | ||
| Mass Air Flow Meter | ||
| Hunting (Poor idling) | Electronic Throttle Control System | |
| Intake System | - | |
| ECM Power Source Circuit | ||
| Hesitation and/or poor acceleration | Fuel Pump Control Circuit | |
| Spark Plug | ||
| Ignition System | ||
| Fuel Injector Assembly | ||
| Mass Air Flow Meter | ||
| Electronic Throttle Control System | ||
| Intake System | - | |
| Compression | ||
| Brake Override System | ||
| Surging (Poor driveability) | Spark Plug | |
| Fuel Pump Control Circuit | ||
| Ignition System | ||
| Fuel Injector Assembly | ||
| Mass Air Flow Meter | ||
| Variable Valve Timing System | ||
| Compression | ||
| Engine stalls soon after starting | Fuel Pump Control Circuit | |
| Spark Plug | ||
| Ignition System | ||
| Fuel Injector Assembly | ||
| Variable Valve Timing System | ||
| Electronic Throttle Control System | ||
| Intake System | - | |
| PCV Hose | ||
| Compression | ||
| Engine stalls only during A/C operation | A/C Signal Circuit | |
| ECM |