Geely CK Series 2007 Workshop Manual page 77

(3) Diagnosis procedure for insufficient engine power (Figure 150)
Insufficient power
Insufficient
Check whether throttle valve can be fully open
OK
Check whether the air cleaner is clogged
OK
Check the throttle valve position sensor for failure
OK
Check the water temperature switch and thermostat
OK
Check the vacuum pressure sensor for failure
OK
Check the fuel pressure
OK
Check the oxygen sensor
OK
Check the injector
OK
Replace the spark plug, ignition coil and high voltage wire
OK
Disassemble the engine
2. Poor deceleration
(1) Symptom
Idling is normal, but the engine is frequently turned off upon sudden release of the accelerator pedal
during driving.
(2) Causes and Troubleshooting:
a. Throttle position sensor is damaged and shall be replaced;
b. Initial idling is not properly adjusted or automatic idle control is wrong, fuel cut RPM is too low,
ECU fault, repair or replace them.
70
Unable to be fully open
Clogged
Abnormal
NG
NG
Excessively low or high
Incorrect
Replace
Incorrect
Replace
Figure 150
Adjust
Clean or replace
Repair or replace
Replace
Replace
Service the electric fuel pump,
fuel filter and fuel pressure regulator