How to Troubleshoot a Caterpillar 320c Engine Underpower

Caterpillar ET 2023A, 2022A & 2019C Electronic Technician Diagnostic Software 

   1 lack of engine power

 The possible causes and solutions are as follows.
 (1) Fuel quality is poor. Drain the fuel from the fuel tank and install a new fuel filter element. Fill the fuel tank  with high-quality fuel.

 (2) The fuel pressure is low. Make sure there is enough fuel in the fuel tank. Check the fuel system for leaks. Check the  fuel line between the fuel tank and the fuel transfer pump for severe bends. Check for air in the fuel system. Check fuel  pressure. At full load speed, the output pressure of the fuel delivery pump is
 (240±35) kPa. If the fuel pressure drops, install a new fuel filter element. Check that the fuel bypass valve moves  freely. Install a new fuel bypass valve if necessary.

 (3) There is air in the fuel system. Find the leak in the fuel system and fix the leak. Remove air from the fuel system.

 (4) There is a leak in the intake system. Check the pressure in the intake manifold. Check the air resistance of the air  filter.
 (5) Fuel setting is incorrect. Adjust fuel settings if necessary.

 (6) Governor lever. Adjust the tie rods to have full travel. Replace damaged or malfunctioning parts.

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 (7) The valve clearance is incorrect. Adjust the valve clearance.

 (8) The fuel injector is faulty. Run the engine at a specific speed to maximize misfiring or rough running. Then, loosen  the fuel pipe nuts of the fuel injectors of each cylinder one by one. Every time a fuel tube nut is loosened, the misfire  or rough running will be exacerbated. If the above situation does not occur after loosening a fuel pipe nut, test the  fuel injector of the cylinder. Install new parts if necessary.

 (9) Fuel injection timing error. Adjust fuel injection timing.

 (10) Carbon deposits in the turbocharger. Check the turbocharger. Repair turbocharger if necessary.

 (11) The filter screen of the fuel delivery pump filter is clogged. Remove and clean the filter.
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