No. 12 Lack/Loss Of Power-Acceleration/Cruise: Notes

POSSIBLE CAUSES DESCRIPTIONS

12	Lack/loss of power-acceleration/cruise
DESCRIPTION	Performance is poor under load (e.g. power down when climbing hills).
POSSIBLE CAUSE	Improper A/C system operation Erratic signal or no signal from CMP sensor Air leakage from intake-air system parts Improper operation of electronic throttle control system Purge control solenoid malfunction EGR valve malfunction Brake dragging Erratic signal from CKP sensor Low engine compression Vacuum leakage Poor fuel quality Erratic signal ignition coil Engine overheating Throttle body malfunction Spark plug malfunction Air cleaner restriction PCV valve malfunction Improper valve timing due to jumping out of timing belt Improper operation of variable valve timing control system Restriction in exhaust system Intermittent open or short in fuel pump circuit Inadequate fuel pressure Fuel pump mechanical malfunction Fuel line restriction or clogging Fuel leakage from fuel injector Fuel injector clogging Intermittent open or short of MAF sensor, APP sensor, TP sensor and VSS ATX malfunction (ATX) Clutch slippage (MTX) 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. 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 REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE ). (See AFTER REPAIR PROCEDURE ). CAUTION: Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.

Lack/loss of power-acceleration/cruise

DESCRIPTION

Performance is poor under load (e.g. power down when climbing hills).

POSSIBLE CAUSE

Improper A/C system operation
Erratic signal or no signal from CMP sensor
Air leakage from intake-air system parts
Improper operation of electronic throttle control system
Purge control solenoid malfunction
EGR valve malfunction
Brake dragging
Erratic signal from CKP sensor
Low engine compression
Vacuum leakage
Poor fuel quality
Erratic signal ignition coil
Engine overheating
Throttle body malfunction
Spark plug malfunction
Air cleaner restriction
PCV valve malfunction
Improper valve timing due to jumping out of timing belt
Improper operation of variable valve timing control system
Restriction in exhaust system
Intermittent open or short in fuel pump circuit
Inadequate fuel pressure
Fuel pump mechanical malfunction
Fuel line restriction or clogging
Fuel leakage from fuel injector
Fuel injector clogging
Intermittent open or short of MAF sensor, APP sensor, TP sensor and VSS
ATX malfunction (ATX)
Clutch slippage (MTX)
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.
  - 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 REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual.
    (See BEFORE REPAIR PROCEDURE ).
    
    (See AFTER REPAIR PROCEDURE ).
CAUTION:
- Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.