Great Wall GW491QE, Руководство по обслуживанию

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EF.1-47
13. The acceleration is slack and with inferior performance.
S.N. Operation steps
Check
result
Follow-up steps
Yes
Check and repair the air
inlet system.
1
Check for following failures: slide of clutch, low pressure inside tire, dragging
brake, inappropriate size of tires, inappropriate positioning of four wheels, etc.
No Next step.
Yes
Check and repair the air
inlet system.
2 Check whether the air filter has been blocked.
No Next step.
Yes Next step.
3
After the connection with fuel manometer (the connection point is on the front
end of oil inlet pipe included in the fuel distributing pipe assembly), check
whether the fuel pressure keeps at about 260 kpa while engine is running at
idle-speed; and whether the fuel pressure keeps at about 300kpa after vacuum
pipe has been pulled away from the fuel pressure adjustor.
No
Check and repair the oil
supply system.
Yes Next step.
4
Pull out the division line from one of cylinders before it’s connected with spark
plug, and keep the electrode of spark plug about 5mm away from engine body,
and check whether a normal high-voltage fire is produced while the engine is
running.
No Adjust or change it.
Yes Next step.
5
Check and observe whether the model and clearance of spark plug on each
cylinder is in compliance with the specification.
No Adjust or change it.
Yes
Wash relevant parts and
components.
6
After a removal of idle-speed adjustor, check whether any carbon deposit is
produced on the throttle valve unit and the idle-speed adjustor, or inside the
idle-speed bypass air duct.
。
No Next step.
Yes Next step.
7
Check whether the inlet-air pressure sensor, throttle position sensor, and its
loops are under a normal condition.
No
Check and repair relevant
loops or change the
sensor.
Yes
Change the failed
components.
8
Remove the oil injector, and check whether it has any leakage or has been
blocked using a special washing analyzer instrument.
No Next step.
Yes Change the fuel
9
Check the fuel condition, and observe whether the symptom is caused by the
filling with petrol.
No Next step.
Yes Next step.
10
Check whether the engine ignition sequence &timing conform to relevant
specifications.
No
Check and repair the
ignition timing.
Yes Next step.
11 Check whether the exhaust pipe is free.
No
Repair or change the
exhaust pipe.
Yes Diagnosis help.
12
After a connection with the commutator within the electronic injection system,
open the ignition switch to check whether respective power supply to Pin 12,
13, 44, 45, 63 is under a normal condition; and whether respective metal part
overlapped on Pin 3, 51, 53, 61, 80 is under a normal condition.
No
Check and repair relevant
loops.
United Electronic engine management system-Genaral troubes hooting and steps
to engine
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