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Maintaining a diesel engine often revolves around routine repairs and replacing fuel system components based on mileage and age. However, one crucial—yet frequently overlooked—aspect of injector and injection pump upkeep is ensuring accurate diesel injection timing. 🔧 Modern vs. Traditional Systems Modern common rail diesel engines benefit from computer-controlled systems that adjust injection timing dynamically throughout their lifespan. By contrast, traditional pump-line-nozzle (PLN) systems depend entirely on mechanical timing. In these engines, start-of-injection is determined by the relationship between piston position during the compression stroke and the precise moment fuel begins flowing through the injector. Timing adjustments are typically made...