Why does my diesel crank but not start?
If the engine rotates but will not fire, describe it as a crank-no-start. This is a different request from clicking or no crank. Engine identity, recent fuel work and the complete warning history are more useful than guessing at a replacement part.
Application & limits
Commercial trucks and equipment. Match the installed engine or machine, year and serial number before testing.
What the symptom or code tells you
Cummins directs fault lookup through the engine serial number. That is important when different control systems or emissions generations share a familiar engine name.
Record whether the problem began after refuelling, a filter change, a repair or a period parked. These details help define the diagnostic starting point. They do not confirm a fuel-supply or electronic fault by themselves.
Information to send
Use details already available from the normal operator position or your records. Do not run a test or approach a hazard to collect them.
- Engine model and serial number from existing records, plus truck VIN or machine ID.
- Last successful run and what changed before the failed start.
- Refuelling/filter work and any fuel-level information already known.
- All dashboard messages and codes, with FMI if shown.
What the mechanic assesses
A mechanic matches the starting symptom to the engine-specific diagnostic information and available scan data. Fuel supply, engine-management and start-authorization assessment may require different preparation. If the starter does not rotate the engine normally, use the linked no-crank guide when booking.
Prepare a repair request
Text the machine or vehicle, exact symptom and location. We confirm scope, safe access, parts needs, pricing and availability before a visit.
Serving Langley, Port Kells and the Lower Mainland service area. Readers elsewhere can use the source references and contact a qualified local service provider.
Related service & guides
Sources & applicability
Editorial update: . Public manufacturer and authority references checked on this date. Current vehicle-specific procedures and superseding information must be matched to the actual application before diagnosis or repair.
- Cummins QuickServe fault-code analyzer
Undated Cummins public reference. ESN-based identification; not a diagnostic procedure for every engine.
- Delco Remy: starting and charging troubleshooting support
Delco Remy troubleshooting support, June 2024. Commercial and off-highway starting/charging reference; use the installed system specification.