Ram / Dodge 5.9L Cummins
5.9L Cummins hard start & no start
Grid heater, fuel supply and sensor testing for 5.9L starting problems.
Why this matters on the 5.9L Cummins
The Cummins uses an intake grid heater rather than glow plugs. Relay or heater faults, supply pressure and sensor failures cause starting complaints.
Symptoms owners notice
- Long crank when cold
- White smoke at start
- No start
What we check
- Grid heater relay and element test
- Supply pressure
- Crank/cam sensor data
Repair work involved
- Grid heater and relay repairs
- Fuel supply repairs
Trucks with the 5.9L Cummins
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