Engine Stalls-After Start/At Idle: Notes
ENGINE STALLS-AFTER START/AT IDLE (VIN Y) DESCRIPTION AND POSSIBLE CAUSE
| Troubleshooting item |
Engine stalls-after start/at idle |
| Description |
- Stalling occurs if vehicle is left idling under no load.
- Stalling occurs when load (electric, A/C) is applied during idling.
- Stalling occurs if the accelerator pedal is depressed from an idling condition when accelerating from a stop.
|
| Possible cause |
- Engine overheating
- PCM DTC is stored
- Erratic signal to PCM
- APP sensor or related circuit malfunction
- ECT sensor No. 1 or related circuit malfunction
- ECT sensor No. 2 or related circuit malfunction
- MAF sensor or related circuit malfunction
- MAP sensor or related circuit malfunction
- A/F sensor or related circuit malfunction
- HO2S or related circuit malfunction
- Improper operation of A/C system
- Improper operation of drive-by-wire control system
- Purge solenoid valve malfunction
- Open circuit in MAF sensor ground circuit
- Intermittent open circuit in PCM ground circuit
- Poor fuel quality
- Air leakage from intake-air system
- Intake-air system restriction
- Electrical connector disconnected
- No battery power supply to PCM or poor ground
- Fuel leakage
- Vacuum leakage
- No signal from CKP sensor
- Loose installation
- Damaged trigger wheel (crankshaft pulley)
- Open or short circuit in related wiring harness
- Erratic signal from CMP sensor
- Loose installation
- Damaged trigger wheel (intake camshaft and/or exhaust camshaft)
- Open or short circuit in related wiring harness
- Inadequate fuel pressure (high or low pressure side)
- High fuel pressure sensor or related circuit malfunction
- High pressure fuel pump malfunction
- Spill valve control solenoid valve control circuit malfunction (damage to driver in PCM caused by short circuit to ground system)
- Spill valve control solenoid valve malfunction (built-into high pressure fuel pump)
- Relief valve (built-into high pressure fuel pump) malfunction
- Fuel line restriction
- Fuel filter clogged
- Fuel pump unit malfunction
- Fuel injector malfunction
- Incorrect fuel injection timing
- Improper operation of electric variable valve timing control system
- Electric variable valve timing driver malfunction
- Electric variable valve timing motor malfunction
- Electric variable valve timing actuator malfunction
- Improper operation of hydraulic variable valve timing control system
- Ignition system malfunction
- Ignition coil malfunction
- Low engine compression
- Improper intake valve timing
- Improper exhaust valve timing
- Exhaust system and/or TWC restricted
- PCV valve malfunction
- Injector driver (built-into PCM) malfunction
|
| Possible cause |
WARNING:
- The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services:
- Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
- Highly pressurized fuel may spray out if the fuel line is cut. Due to the following dangers occurring with a fuel spray, always complete the "Fuel Line Safety Procedure" to prevent the fuel from spraying. (See BEFORE SERVICE PRECAUTION [VIN Y (US)]
.)
- Fuel may cause irritation if it comes in contact with skin and eyes.
- If fuel ignites and causes a fire, it may lead to serious injury or death, and damage to property and facilities.
- Fuel is highly flammable and dangerous. Fuel line spills and leakage can cause serious injury or death, and damage to equipment. Always refer to the "Quick Release Connector Removal/Installation (fuel system)" before performing the fuel hose installation, and execute the "Fuel Leakage Inspection" after installation. (See QUICK RELEASE CONNECTOR (FUEL SYSTEM) REMOVAL/INSTALLATION [VIN Y (US)]
.) (See AFTER SERVICE PRECAUTION [VIN Y (US)]
.)
CAUTION:
- Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.
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 Courtesy of MAZDA MOTORS CORP.
|
 Courtesy of MAZDA MOTORS CORP.
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CAUTION:
- Verify the malfunction symptom according to not only the PID value but also the symptom troubleshooting.