What Is Troubleshooting in an Engine?

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Engine troubleshooting is the systematic process of identifying what's causing your engine to run poorly or not at all. It focuses on the three things every engine needs: air, fuel, and spark. Technicians check if the fuel system delivers proper pressure, if spark plugs fire correctly, and if the engine has good compression. They also examine sensors that tell the computer how to adjust the air-fuel mixture. Common tests include checking fuel pressure, testing ignition coils, performing compression tests, and reading sensor data through diagnostic scanners. Learn to recognize signs of engine problems and understand common causes of engine failure. For detailed guidance, see our article on how to diagnose engine misfires.