Join Date: Apr 2008
Location: Beeville, TX
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I would be worried about that. That sort of thing happened on my 6.0l. Obviously it has different injector technology, but it had the same effect. It was pouring black smoke, and it would go like hell. Then, according to the Ford dealer in West, Texas (where it gave out) the fuel injector broke in half. To me, it started pouring enormous amounts of white and black smoke. I am sure it flooded the cylinder with fuel and coolant when it exploded.
If there is any quirk that 6.4's are known for besides bad radiator design it's fuel injectors getting stuck open. If the code comes up again, or if you continue noticing the weird power properties, I would definitely get ti checked by a Ford dealer. You don't want to burn a hole in the piston head.
Eli Benson - EMT, Ambulance Mechanic
'08 F350 Dually KR - Spartan'd
'07 F250 CC SB 4x4 XLT - SCT /w Innovative Tunes
4 '09 & '10 E350 6.0l ambulances
1 '08 Duramax 6.6 (LMM) van ambulance