Why Do Diesel Vehicles Consume More Fuel Than Before?

[PresleyFitz]

Reasons why diesel vehicles consume more fuel than before: 1. Fuel injector: Long-term use can lead to clogged injector nozzles due to carbon deposits from incomplete combustion. A dirty air filter, idle motor, or throttle body, as well as a dirty fuel filter, can cause the engine control module to miscalculate the fuel injection volume, leading to excessive fuel consumption. 2. Ignition system: Poor performance of the ignition module can result in weak high-voltage sparks, reduced ignition capability, and incomplete combustion of some fuel-air mixture, increasing fuel consumption. Excessive carbon buildup on spark plugs, leakage in spark plugs, spark plug sleeves, or certain high-voltage wires can also reduce ignition capability and cause some cylinders to misfire, increasing fuel consumption. 3. Valve train: In the valve train, incorrect valve clearance (either too large or too small) can prevent adequate air intake and clean exhaust. Additionally, erosion of valves and valve seats can compromise ideal sealing, reducing cylinder pressure and engine power.