Have Ford Questions? Ask a Mechanic for Answers ASAP
Do you know what the ICP pressure is while cranking it over?
If the high pressure pump failed or you have an internal leak it wont build enough ICP pressure to start.
Let me know if you need more help.
Yes that means the low pressure pump is working ok. On the 6.0l unplugging the ICp will only cause a change if the engine is running, if it ids a no start unplugging it does nothing.
check the stand pipe for the oil filter it may have got hot enough to melt it and plug off the passage to the high pressure pump reservoir.
Most likely it is a high pressure oil leak, probably at the oil rail dummy plugs under the valve covers