A 6.0L Power Stroke that cranks but will not start is usually a high-pressure oil or FICM problem - the HEUI injectors need both oil pressure and FICM voltage to fire.
What causes no-start on the 6.0L Power Stroke
- Low injection control pressure (HPOP or IPR)
- Low FICM output voltage
- A leaking high-pressure oil connection (STC fitting, standpipes/dummy plugs)
- A failed camshaft position sensor
- Weak batteries
How to diagnose it
Read injection control pressure at cranking - if it will not build the minimum, look at the HPOP, IPR, and high-pressure oil seals. Check FICM voltage (should be near 48V). Confirm the batteries are strong.
The fix
Fix the cause: a worn IPR is a common, affordable fix; a HPOP that cannot build pressure is replaced; reseal leaking high-pressure oil connections; replace a low FICM. Address weak batteries first.
Frequently asked questions
Why does my 6.0L crank but not start?
It usually cannot build the injection control pressure or FICM voltage the HEUI injectors need. Read ICP at cranking and check FICM output.
Can the FICM cause a no-start?
Yes - low FICM output, especially when cold, can prevent the injectors from firing.
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