Cause damage to vehicles, fuel pump failures can not start parsing – Maintenance – Automotive repair and maintenance industry
1, failure: driving in their own Extinction Phenomenon, starting as soon turn off the engine and then can not start. Related Reading: Special car maintenance code after the rain Enjoy the cool of a summer special summer car maintenance all captures
Check: The VAG1552 query engine has a fault code: "16706 – Engine Speed Sensor G28 no signal. Replacement of speed sensor can not start, but fault code memory. Remove the ignition coil and 1 cylinder Spark Plug , Start the engine found in high-pressure fire, unplug the fuel rail there is no gas flow into the pipe was found, with the power supply wires directly to the fuel pump does not turn.
Analysis: direct power the fuel pump motor still does not change, indicating the fuel pump damage.
Excluding: replacement electric fuel pump, troubleshooting.
2, Throttle Body through dirty cause ASR lights models: Polaris 1.8TMT. Mileage: 35,000 km.
Phenomenon: a moving and sometimes anti-slip ASR warning lights Always start, but had no effect on driving, maximum speed, acceleration normal.
Check: Using VAG1552 read to the three fault code: engine air flow meter signal is too low; G188 signal is not correct; throttle Idle Opening overrun.
Analysis: dirty throttle body had led through the large opening to achieve the ASR light alarm conditions.
Excluded: Cleaning throttle body, ASR warning light is off, the vehicle tracking mileage 45000km when the fault does not occur again.
3, G212 failure code, subject to the exhaust gas recirculation valve setting models: Polaris 1.8.
Fault: Engine Idle Speed Shake . Check: Using VAG1552 query to the two fault codes: G212 fault; 1-cylinder, 2-cylinder fuel injector accidental short circuit fault on the ground. Reading data flow idle throttle 1.9%.
Rule: Use VAG1552 enter 01-04-074, do exhaust gas recirculation valve settings, display OK, then check no trouble starting the engine jitter disappears.
4, high-voltage damage to cause the engine Idle Speed Vehicle: Polaris 1.8.
Fault: just after starting the engine running smoothly, after about 5min, the engine began to idle instability, speed swimming in between 480 ~ 980r/min.
Check: check with VAG1552 sensor and crankcase ventilation valve failure was observed before the sensor adjustment value, before adjusting the value of -25% sensor, voltage does not change around 1.25 ~ 1.35V. Clear fault codes after the engine running smoothly, sensors regulate normal. Observation of the engine functioning, about 5min after the sensor adjustment values from ± 10% -15% of the change to, and started to idle instability and swimming behavior between 480 ~ 980r/min. Close to restart the engine, engine running smoothly, 5min after the idle chattering reproduce. Check the spark plug electrode coke more, 4-cylinder the most obvious.
Analysis: If the high-voltage spark plug or faulty ignition cause poor engine idle speed deviated from the set value, then the engine control unit will by adjusting the fuel injection quantity, increase the throttle to increase speed. As the fuel injection through increased volume of the mixture is too thick, sensor sensing the oxygen content decreased gradually adjust the value to -25% change, engine control units to reduce fuel injection quantity, adjust the engine speed is too low, causing the engine idle speed in the final large range of swimming. Excluding: replacement of four spark plugs, starter motors, fault phenomenon has not improved, replace the four high-voltage troubleshooting.
5, spark plugs cause the engine unable to skirt ablation models: Polaris 1.6. Mileage: 18,000 km.
Fault: the engine unable to hang off a ton cars stall phenomenon. Check: First check the engine trouble with VAG1552 store, read the normal data stream, measure the normal high voltage resistance. Remove the spark plug, spark plug found in three ablation phenomenon occurs skirt, another skirt spark plug cracks.
Analysis: As the engine combustion quality of normal or spark plugs, spark plug skirt crack.
Excluded: 4 spark plug replacement, troubleshooting.
6, spark plug wire lead to extinction of carbon models: Polaris 1.8T. Fault: the engine idle shake, accelerated Dayton car.
Check: Using VAG1552 query to a Fault Code: 2-cylinder ignition control circuit. Replacement of 2-cylinder ignition coils, engine idling is still dithering. Fault code and then query did not exist, but the read data stream repeatedly found two cylinders fire 300. 2 cylinder spark plug removed, see the center electrode and side electrode has a carbon filament.
Analysis: a fire situation or of poor quality gasoline, tends to produce carbon electrodes spark plug wire, and some new cars to replace the spark plug to happen. Excluded: Clear carbon wire, start engine, idle smooth, 2-cylinder fires detected in the number of 0.
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