Zontes ZT310T-M, Руководство по обслуживанию

Страница: 109 / 184

109
/
184
Troubleshooting
Check the following items before diagnosing the ignition system
a. Check whether the spark plug is abnormal;
b. Check whether the ignition coil high-voltage cap or plug is loose;
c. Check whether water enters the high pressure cap;
d. If there is no spark, find the ignition coil of the same model to confirm that there is no fault and install it on the
faulty vehicle to test whether there is spark;
e. Check to unlock the vehicle, turn the flameout switch to "", and measure whether the "initial voltage" of the
ignition primary coil is consistent with the battery voltage when the engine is not started.
Spark plug without spark
1. Improper spark plug gap
If the gap is too small, the electrode has a "flame suppression" effect to inhibit flame generation, and the spark
intensity is weak; if the gap is too large, the ignition voltage will cause no spark. Adjust to the standard 0.8-0.9mm
(0.031-0.035 in).
2. A layer of oil film is attached to the surface of the spark plug electrode
Engine oil or gasoline flees into the combustion chamber and adheres to the surface of the electrode, causing the
electrode to short-circuit and cause no sparks. Engine oil is generally introduced from the gap between the piston and
the cylinder wall and valve guide. Check whether the gap is normal. If it is abnormal, replace the corresponding parts.
The accumulated gasoline may be caused by the mixture being too thick when the cold engine is started, and it can
be cleaned before trying to ignite.
3. The spark plug skirt is damaged
The high-voltage current breaks down and leaks from the damaged part of the skirt, and the spark plug needs to be
replaced.
4. The electrode has carbon deposits, and the center electrode leaks electricity to the surroundings without
discharging to the electrode
Excessive accumulation of carbon or oil on the electrode causes a short circuit; and may cause the insulator to burn
out. Clean up carbon deposits or replace spark plugs.
5. Electrode damage
The center electrode is damaged by the electric spark or the chemical corrosion of the burning gas for a long time,
and it needs to be replaced.
6. Reduced spark plug insulation
Reduced insulation performance will weaken the ignition voltage, resulting in weakened or no sparks; need to be
replaced
7. Short circuit of ignition coil high voltage wire
Ignition coil needs to be replaced
8. Insufficient battery power
If the battery is insufficient, the spark strength is weak or there is no spark. Use the charger provided with the car to
charge. Or charge for long-distance riding.
9. ECU failure
After the above reasons are eliminated, the ECU that has been removed from the same model vehicle can be
replaced with a faulty vehicle to judge.