Diesel trucks aren't just gas trucks with different fuel. The fuel systems, emissions systems, turbocharging, and engine management are entirely different — and most general shops aren't equipped to work on them properly. We work on diesel daily: 5.9L and 6.7L Cummins, LB7 through L5P Duramax, 6.0L, 6.4L, 6.7L Power Stroke, and Sprinter/Promaster diesels. A Supercanic network shop — the same heavy-duty service standards across every location.
Diesel computers store data most generic scanners don't read — fuel rail pressure, individual cylinder fuel correction, injector firing patterns, turbo vane position, DPF soot loading, DEF quality. We have the tools to read all of it.
Modern diesels run common-rail fuel pressure of 20,000–30,000+ PSI. A weak high-pressure pump or a leaking injector kills performance and economy. We test fuel rail pressure and injector return flow.
Most 'mystery' modern diesel problems trace back to emissions: clogged DPF, failing DEF sensor, stuck EGR valve, failed NOx sensor. We diagnose these without throwing parts at them.
Boost pressure, vane operation (on VGT turbos), shaft play, oil leaks. A turbo problem on a modern diesel is often actuator-related, not the turbo itself.
Bosch injectors for Cummins, Denso for Duramax, OEM for Power Stroke. We don't install reman injectors from unknown sources — they fail and ruin the job.
After repair we force a DPF regeneration if needed, verify boost pressure across the RPM range, confirm fuel pressure under load, and road test. Documented before/after on every repair.
Standard on most repairs. Parts and labor. If something we touched fails, we fix it again — no charge, no argument. That's how locally-owned shops have to operate.
★ Mon–Sat 7AM–6PM ★ 1685 S State St, San Jacinto, CA ★