Models: a 02 Toyota Land Cruiser 4500,1FZ-FE engine, mileage 95,000 km.
Symptom: The owner of this car since the reaction is due to an accident repair, it appeared idling regularity jitter phenomenon, before this without any failures. After taking over the car test, when the engine is idling, sitting in the cab holding the steering obd2 scan tool wheel when the engine obviously felt regularly shake. When the engine speed above idle, jitter fault disappears, while driving regardless of any speed without adverse effects.
Troubleshooting and exclusion: let the engine idle, read the engine control system and data flow using X-431 detector, are within the normal range, and no fault code display. Since the engine control system is normal, should focus on checking high voltage. This prompted the owner of the car had an engine overhaul, repair shop was also detected in the other before, this is also the replacement of high-voltage lines, spark plugs and ignition coils. Symptom After changing but more serious than before, the mechanical part of the engine exploded again after installing the fault persists. Found during an inspection high-voltage icom a2 bmw non-original parts, replace the original high-voltage lines, fault phenomenon than previously reduced, but not completely ruled out. Remove the spark plug observation, using a platinum spark plugs, to work properly. Discover the original maintenance manual was informed that this car spark plug for the ordinary type spark plugs, replace them all into a common type of spark plug after Toyota's dedicated, commissioning, fault disappears.
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