There is direct fuel injection in diesel engines because at the second stroke of compression, the air is highly compressed which raised to high pressure and temperature, the diesel is injected at just before the end of compression stroke and allows diesel to ignite automatically because of high pressure and temperature.
How to bleed a diesel fuel injection system?
How to Bleed a Diesel Fuel Injection System
Do fuel system cleaners actually really work?
Yes! When used regularly, fuel system cleaners can help work to remove harmful deposits and keep new ones from forming. They are especially important for engines running on gasoline containing Ethanol and fuel-injected engines.
What are the best fuel injectors?
Best Fuel Injector Cleaners 2018- Our Guide to the Best Fuel Additives