No. 12 Lack/Loss Of Power-Acceleration/Cruise: Notes
NO. 12 LACK/LOSS OF POWER-ACCELERATION/CRUISE DESCRIPTION AND POSSIBLE CAUSE
| 12 |
LACK/LOSS OF POWER-ACCELERATION/CRUISE |
| DESCRIPTION |
- Performance is poor under load (such as power down when climbing hills).
|
| POSSIBLE CAUSE |
- Drive-by-wire control system operates with brake override system.
- Poor fuel quality
- Air leakage from intake air system
- Intake air system restriction
- Improper installation of EGR valve
- Vacuum leakage
- Clutch slippage (MTX)
- PCM DTC is stored.
- Engine overheating
- Intake air temperature is too hot.
- Erratic signal to PCM
- APP sensor malfunction
- TP sensor malfunction
- CKP sensor or related wiring harness malfunction
- MAF sensor or related wiring harness malfunction
- IAT sensor or related wiring harness malfunction
- Battery power supply circuit malfunction
- VSS or related wiring harness malfunction
- CKP sensor and teeth of crankshaft pulley malfunction
- Spark plug malfunction
- Fuel injector malfunction
- Fuel leakage from fuel injector
- Fuel injector is clogging
- Throttle valve restriction or clogged
- Improper operation of drive-by-wire control system
- Exhaust system part malfunction
- Excessive or insufficient fuel pressure
- Fuel pump relay or fuel pump circuit malfunction
- Restriction in fuel line
- Pressure regulator malfunction (built-into fuel pump unit)
- Fuel pump unit malfunction
- Improper operation of variable tumble control
- Improper operation of variable intake air control
- Improper operation of A/C system
- Purge solenoid valve malfunction
- EVAP control system malfunction
- CMP sensor and teeth of camshaft malfunction
- EGR valve malfunction
- Improper operation of EGR system
- Improper operation of variable valve timing control system
- Low engine compression
- Improper valve timing
- PCV valve malfunction
- ATX internal malfunction (ATX)
- Brake dragging
WARNING:
- The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system:
- Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
- Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this service information. (See BEFORE SERVICE PRECAUTION
.) (See AFTER SERVICE PRECAUTION
.)
CAUTION:
- Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the 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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