Diesel fuel system repair in Scottsbluff, NE is what we do — and we do it right. Fuel system issues cause 30-50% of all diesel drivability problems. Modern common-rail diesel fuel systems operate at 20,000-30,000+ psi, and every component in that system demands precision, cleanliness, and the correct parts. As an authorized Bosch distributor, we install OEM Bosch parts on the components Bosch actually manufactures — injectors, high-pressure pumps, and complete fuel systems. Every fuel system service includes a free digital vehicle inspection with photos, and every repair is backed by our 3-year/36,000-mile warranty.
You can check for any open safety recalls on your vehicle at NHTSA's official recall lookup.
CP4 Fuel Pump Failure and Replacement
The Bosch CP4 high-pressure pump is used in Ford 6.7L Powerstroke (2011-2019), GM Duramax LML (2011-2016), and later Cummins 6.7L (2019+) applications. When CP4 pumps fail, they send metal debris throughout the entire fuel system — meaning a simple pump replacement isn't enough. The correct repair requires complete fuel system contamination cleanup: replacing every affected component (injectors, high-pressure lines, fuel rails, low-pressure lines, tank cleaning) alongside the pump replacement. Skipping this step causes the new pump to fail shortly after. We do the job correctly, using contamination kits with OEM Bosch parts. Done right, the repair holds.
Bosch Diesel Injector Service and Replacement
Diesel injectors are precision components manufactured under tight tolerances. When they fail — from wear, contamination, or design issues — symptoms range from rough idle and poor fuel economy to complete no-start. As an authorized Bosch distributor, we install OEM Bosch injectors on every applicable diesel platform. Common injector issues we address: Powerstroke 6.0L stiction (leaking injector return lines and dead-cylinder codes), Duramax LB7 injectors (a widespread known issue), Cummins injector wear on higher-mileage trucks, and Isuzu NPR injector service. Aftermarket injectors commonly fail at 30-50% the service life of genuine OEM Bosch parts — the difference is real.
Fuel System Contamination Cleanup
When a CP4 pump fails (or when metal debris enters the fuel system for any reason), simply replacing the failed component causes rapid re-failure. The correct repair requires a complete contamination kit: replace the pump, replace all injectors, replace high-pressure fuel lines and rails, clean and inspect low-pressure lines, and clean or replace the fuel tank as needed. We stock contamination kits and do this job the way it should be done — not the fast-cheap-fails-again way.
High-Pressure Fuel Pump Replacement
In addition to CP4 pumps, we replace CP3 pumps (the older, more robust predecessor on 5.9L and early 6.7L Cummins, LB7-LMM Duramax), CP4 pumps (the current common failure point), and specialty pumps on Sprinter and Isuzu applications. Some diesel owners upgrade CP4 systems to CP3 conversions for reliability — we can perform this upgrade if you're interested.
Diesel Fuel Filter Service
Fuel filter service is the single most important thing you can do to protect your fuel injection system. Modern diesel injectors are extraordinarily sensitive to fuel contamination — a single skipped fuel filter service can lead to very costly injector damage. We service fuel filters at manufacturer intervals (typically 15,000-30,000 miles) using quality OEM filters. Most diesel applications have both a primary and secondary fuel filter — we service both.
Fuel Injection Line Service
High-pressure fuel injection lines carry fuel at 20,000-30,000+ psi. When they leak (crush washers, fittings, or line cracks), the leak can be dangerous and expensive. We inspect fuel injection lines during service, replace crush washers with correct-torque procedures, and replace lines when needed with OEM parts.
Lift Pump Service (Cummins Applications)
Second-generation Cummins (1998.5-2002) and third-generation (2003-2007) Rams are notorious for lift pump failures. When the frame-mounted lift pump fails, it stops supplying fuel to the VP44 injection pump, causing hard starts and eventual VP44 failure. We diagnose lift pump issues and replace them with quality replacements — many owners upgrade to aftermarket lift pumps with higher flow ratings for better reliability.
Fuel Tank Cleaning and Service
When fuel systems are contaminated (from CP4 failure, water intrusion, or foreign debris), fuel tank cleaning is often required as part of the repair. We drop, drain, clean, and inspect fuel tanks as part of complete fuel system service — because putting new fuel system components on a contaminated tank causes them to fail.
Common-Rail Fuel System Diagnostics
Modern common-rail diesel fuel systems are complex — high-pressure pump, fuel rail pressure sensors, injectors with electronic actuators, return lines with pressure regulators. When something in the system fails, precise diagnostics with manufacturer-grade scan tools separates the actual cause from the symptoms. We diagnose fuel system issues correctly the first time — not by throwing parts at problems.
Diesel Fuel Systems FAQ
How do I know if my CP4 pump has failed?
CP4 pump failures typically show up as: complete no-start after driving, sudden loss of power, extended cranking with no start, and metal debris visible in the fuel filter. Once a CP4 has failed, replacing just the pump isn't enough — the entire fuel system needs contamination cleanup.
How much does CP4 replacement cost?
CP4 replacement is one of the most expensive diesel repairs because it requires replacing the entire fuel system to prevent re-failure. Cost varies significantly by vehicle. Come in for a diagnosis and we'll give you a written estimate.
Do you use OEM Bosch parts for fuel system work?
Yes. We're an authorized Bosch distributor and install OEM Bosch parts on injectors, high-pressure pumps, and complete fuel systems. Aftermarket parts commonly fail at 30-50% the service life of OEM Bosch — the difference is real.
Can I upgrade my CP4 to a CP3?
Yes. Many diesel owners upgrade CP4 systems to CP3 conversions for reliability. We can perform this upgrade if you're interested — call us to discuss options for your specific vehicle.
How often should I change my diesel fuel filter?
Typically every 15,000-30,000 miles depending on manufacturer. Fuel filter service is the cheapest way to protect your expensive injection system — skipping it can cost thousands in injector damage.
Schedule Your Service Today
Ready to get started? Call 308-641-5345 or book your appointment online. Every visit includes a free digital vehicle inspection with photos sent right to your phone, complimentary loaner vehicles are available subject to availability, and financing options are available — including zero percent interest for six months for those who qualify, with a secure application link sent to your phone and work approvals handled right from your phone. Every repair is backed by our 3-year/36,000-mile warranty. Serving guests across Scottsbluff, Gering, Mitchell, and the entire Nebraska Panhandle since 2017. Care Beyond Repair.