Hi:
I have a couple suggestions. First, I would take the truck to a nationally recognized parts store like Auto Zone, Advance. Have them scan it for you, and check to see if there any trouble codes. Keep in mind, these parts stores usually scan for free.
If there are any codes, let me know.
Second, I wonder if the fuel pressure is droping in the system over night or a period of time. The fuel system is pressurized, but there may be a leak causing it to drop. Have you have the fuel pressure checked? Maybe you could have that done after the truck sits overnight and explain to the mechanic you're curious if the injection is still primed with fuel and if there is still pressure in the system before the car is started.
Let me know what you find.
JOe
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Friday, October 24th, 2008 AT 1:22 PM