What Causes White Smoke From a Diesel Engine?
Find out what causes white smoke on a diesel engine, from cold-start condensation to blown head gaskets, and learn when to stop driving and call for
Air Brake Pre-Trip Inspection: The Working Check, the Numbers, and the Defects That Mean Do Not Drive
Learn the complete air brake pre-trip inspection: PSI benchmarks, leakage limits, step-by-step cab tests, and the defects that mean do not drive.
How to Reduce Emissions in Diesel Engines
Learn how to reduce emissions in diesel engines with proven steps covering EGR, DPF, SCR, DEF, idle reduction, and fuel quality for Class 6-8 fleets.
Diesel Cranks But Won’t Start: A Heavy-Duty Diagnostic Order That Actually Works
Diesel cranks but won’t start? Learn the proven diagnostic order for Class 6-8 trucks covering fuel, compression, sensors, and ECM faults.
Why Do Diesel Engines Have Two Batteries?
Learn why diesel engines have two batteries, how parallel wiring works, when to replace both, and how to diagnose a dual-battery no-start the right way.
Transmission Noise in Heavy-Duty Trucks: When to Stop and When to Keep Rolling
Hear transmission noise in your heavy-duty truck? Learn when to stop driving, what each sound means, and how certified technicians diagnose the real cause.