That is certainly a problem. Quite common. I've seen a few of them test fine at key on, then cranking, but as soon as the truck fires, voltage drops slowly but surely.

You have good batteries on there right? I can always send you a spare FICM for you to try out too, and you can swap and send me your bum one back as well.

 

I bought a 2005 f250 at an auction, replaced batteries and started truck.. It ran good for about 1 hrs and started running rough and extreme loss of power ... Injectors 3,5,7 came up fixing to replace and noticed metal shavings in oil filter... Anyone seen this before?

Thanks in advance

 

my 2004 f350 Harley edition 6.0 138,000 recently started idling rough and shaking when driving at a constant speed. quits the moment u lift then get back in fuel but when u level out it starts again. also the truck has absolutely no power when pulling out or driving until you are at least going 30mph. no check engine light was coming on. I did however take the truck to orielly's and scanned it. the following codes came up. P0282-p0284-p0299-p0403-p0405-p0500-and p1000. could anyone please help me with learning exactly what I need or should do to fix the truck as diesel is quite new to me. as I bought the truck for my business since I was needing the ability to tow more weight. if you got any issues at all with a 302 or 351 gas though im your guy.

 

Not sure about your ficm issues but my truck does the same thing when first started. Takes a few mins to warm up and then its fine. It lacks a bit of power takes longer to shift and shifts quite hard. Once its warmed up for 5-10 mins it works like normal.