Methods to Increase Fuel Delivery (with caveats):
* Tuning: This is the most common and effective method. A custom tuner (like from EFI Live, Smarty, or others) can adjust various parameters within the ECM, including fuel delivery. This allows for a significant increase in fuel, but requires careful consideration. Improper tuning can lead to engine damage or premature wear. It's crucial to choose a reputable tuner and understand the risks involved.
* Fuel System Upgrades: While not directly "turning up" the pump, upgrading components like the lift pump (to improve fuel supply to the injection pump) or injectors (to handle more fuel) can support higher fuel delivery from a tuned ECM. However, these upgrades often work *in conjunction* with a tune, not independently.
Important Warnings:
* Voiding Warranty: Modifying the ECM will almost certainly void any remaining factory warranty on your engine and related components.
* Engine Damage: Incorrect tuning can lead to catastrophic engine failure. Too much fuel can cause excessive heat, damage pistons, and lead to other problems.
* Emissions: Modifying the fuel system often impacts emissions, potentially leading to issues with compliance if your vehicle is subject to emissions testing.
* Legal Ramifications: In some jurisdictions, modifying emissions systems can result in fines or legal penalties.
Recommendation:
If you want to increase fuel delivery in your 2004 Dodge Cummins, consult with a reputable diesel performance shop. They can advise you on the best approach based on your vehicle's condition and your goals. They can also perform the tuning and any necessary supporting upgrades safely and effectively. Trying to do this yourself without proper knowledge and tools is strongly discouraged.
