* Premature wear: Increased fuel delivery puts extra strain on components.
* Engine seizure: Too much fuel can cause excessive pressure and overheating.
* Excessive smoke: More fuel than the engine can efficiently burn results in significant smoke and poor fuel economy.
* Damaged injectors: High pressure can damage injectors.
* Voiding warranty: Modifying fuel delivery will likely void any existing warranty.
Instead of directly adjusting the injection pump, consider these safer alternatives to increase power:
* Performance tuning: A reputable tuner can reprogram the engine's computer (ECM) for more power while keeping the engine within safe operating parameters. This is generally a much safer and more effective way to increase power.
* Upgrade injectors: Larger or higher-flow injectors can deliver more fuel efficiently. This should be done in conjunction with proper tuning.
* Turbocharger upgrades: A larger or higher-pressure turbocharger can force more air into the engine, allowing for more efficient combustion of increased fuel. Again, proper tuning is essential.
* Exhaust modifications: A free-flowing exhaust system can reduce backpressure and improve engine breathing.
If you're determined to adjust the fuel delivery yourself, you will likely need special tools, detailed knowledge of your specific injection pump (Bosch, VP44, etc.), and a great deal of mechanical skill. The risks significantly outweigh the potential benefits for most individuals. Consult a qualified diesel mechanic for any performance modifications. They can properly diagnose your needs and recommend safe and effective upgrades.
