The TD5 new injector system was put through separate tests on specially develops rigs, and run on kerosene, which represented the worst case situation as far as lubrication properties were concerned. If the injectors provide durable using kerosene, they would also survive the poorest quality diesel fuel.
The injectors and their control system, operating with high fuel pressure, would prove the key to achieving high performance matched with low emissions. A result is as many of us have by now experienced the TD5 achieved a substantial performance boot over the 300 TDI.
And despite this, its emission were so clean that it had no need of a catalytic converter, saving production costs, and saving the owner the worry and potential expense of a costly replacement. The refined combustion of the TD5 is illustrated by the fact that even its predecessor 300TDI needed a cat when emissions legislation was considerably less tough.
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