Glow plugs are used for initial heating of a fuel mix. Glow plugs are not subject to repair therefore in case of their malfunction replace candles. Operability of candles of an incandescence should be checked on HUNDRED.

If after glow plug twisting you see that its top scorched, it indicates bad work of a nozzle. Badly adjusted moment of injection of fuel also negatively is reflected in service life of candles of an incandescence. Upon glow plug purchase always specify engine type, in this case «1Z», and year of release of the car. Malfunction of candles of an incandescence can be noticed, as a rule, only on the cold engine. Fuel in cylinders with normally working glow plugs will ignite earlier, than fuel in cylinders with faulty glow plugs. According to it the engine working with interruptions and a gray exhaust smoke will be signs malfunction of candles of an incandescence.