Cummins Services:
- Full diagnostics and repair for 5.9L and 6.7L Cummins engines
- CP3 / CP4 pump inspection, cleaning, and high-pressure fuel system maintenance
- Injector testing and replacement for smooth idle, power, and efficiency
- Turbocharger inspection and repair to prevent boost loss and bearing damage
- EGR and DPF diagnostics, cleaning, and replacement
- Lift pump inspection and upgrade options to protect injection components
- Transmission service for 68RFE and Aisin units, including fluid and filter changes
- Preventive maintenance programs designed for long-term Cummins performance
Expert Repair & Maintenance for Your Cummins Engine
Ram trucks built with the 5.9L and 6.7L Cummins engines are known for durability, torque, and long-term reliability — but only when serviced by technicians who understand their unique fuel systems, turbo setups, and emissions components. At By The Book Diesel & Auto Repair, we specialize in light-duty Cummins service and use advanced diagnostic equipment to keep your engine performing at its peak.
Our technicians handle the issues that Cummins trucks face most often, including injector wear, turbo lag, fuel contamination, lift pump failure, DPF regeneration problems, and cold-start performance. We take the time to accurately diagnose the root cause, prevent unnecessary repairs, and protect the high-pressure fuel system from damage.
Comprehensive Cummins Repair & Maintenance
Fuel System Expertise
From CP3/CP4 pump testing to injector replacement and lift pump upgrades, we help safeguard one of the most critical systems in your Cummins engine.
Turbo & Air Management
We inspect for boost leaks, vane sticking, and bearing wear to keep your turbo responsive and your truck performing under load.
- Emissions System Service: Our team handles EGR service, DPF cleaning, forced regeneration, and troubleshooting of emissions-related warning lights.
- Transmission Support: We service both 68RFE and Aisin transmissions to ensure smooth shifting and reliable towing capability.
- Preventive Maintenance for Long Engine Life: Regular oil changes, fuel filter service, and scheduled inspections reduce the risk of costly failures and keep your truck ready for work.
Dependable Service for the Truck You Rely On
Whether your Ram is a daily driver, a work truck, or a tow rig, you can count on By The Book Diesel & Auto Repair for accurate diagnostics, clear communication, and repairs done right the first time. We know how important your Cummins engine is — and we treat every truck like our own.
Schedule your Cummins service today and keep your Ram running strong.
