gio Vyper 4WD 1100cc 4 seater XY1100UEL, Service Manual

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11. EFI SYSTEM OF SQR 472ENGINE
11-79
3.13. Accelerating weakness, poor performance
General failure position:
1. Fuel moisture content; 2. The intake pressure sensor and solar term door position sensor;
3. Spark plug; 4. The ignition coil; 5. Solar term door body and idle bypass airway;
6. Inlet; 7. Idle speed regulator; 8. Injector; 9. The ignition timing; 10. The exhaust pipe.
The general procedure of diagnosis:
Serial
number
Operation steps Test
results
Next step
Yes Repair 1 Check the clutch slip, the tire
pressure is low, the brake drag, the
tire size is incorrect, four wheel
positioning is not correct faults.
No Next step
Yes Maintenance of air intake system 2 Check the air filter is clogged.
No Next step
Yes Next step 3 Connect the fuel pressure gauge
(access point for the fuel
distribution pipe assembly inlet pipe
end), start the engine, check the fuel
pressure in the idling condition is
about 38kPa.
No Maintenance of oil supply system
Yes Next step 4 Set aside money in a cylinder of the
cylinder, connected to the spark
plug, the spark plug electrode
distance engine body around 5mm,
start the engine, check the
high-pressure fire intensity is
normal.
No Maintenance of the ignition system
Yes Next step
5
Check the cylinder spark plug,
observe its model and gap whether
payment specification.
No Adjust or replace
Yes Cleaning of parts
6
Remove the idle adjuster, check the
solar term door body, idle speed
regulator and idling on airway
carbon deposition
No Next step
Yes Next step
7
Check the intake pressure sensor,
solar term door position sensor and
its circuit is normal
No Repair or replace the sensor line
Yes Failure to replace
8
Remove the injector, injector with
special cleaning analyzer check
whether the injector is there is a leak
or blockage.
No Next step
Yes Replace fuel
9
Check the fuel situation, observe
whether the failure phenomenon
was caused due to gas
No Next step
Yes Next step
10
Check the engine ignition is Xu and
ignition timing specification
compliance
No Maintenance of the ignition timing
Next step
11
Check whether the smooth air
exhaust pipe
Repair or replace the exhaust pipe
Diagnostic aid
12
Check the X1_1# X1_2# pin on the
iron is normal Maintenance of the corresponding line
11