yep, ever since they started designing these trucks with the sound abatement in the engine compartment and sealing it up nice and tight basically turning them into vacum cleaners they will 's.u.c.k' anything up right into the fan, especially plastic!........doh! hehe :o)

i have to say stretch wrap was the WORST thing ever invented!....run into more of it in the engine compartment and wrapped around the wheels and steering knuckles.

Edward and Kevin thank you so much for all of your help =)

as a general rule, on high hour (>9000 hrs)trucks with an e-27 code, I look at it about like a long due tune up, and while I do eyeball the wires and connections to the POS and PHASE (Crankshaft and Camshaft position sensors) I tell the customer to expect to replace all the coil packs and spark plugs.
As Kevin_t notes, using the correct plugs, and correct gap, not assuming the gap is correct, makes a world of difference in these trucks, and you won't be looking at the next e-27 for a few years (or until the fan draws up a plastic bag and wipes the POS wires to a frayed mess).

What plugs did you install? Did you install OEM plugs or some aftermarket/auto parts store plugs,these engines dont like the aftermarket/auto parts store plugs.
If it isnt the spark plugs next thing i would do is see if you have a coil acting up,these trucks will run on just one cylinder, unplug all but one coil while the truck is running,yes it will throw a code but that can be cleared later,see if the truck will run on each individual coil let it run for a bit then go to the next coil.
If there is a cylinder that isnt firing correctly this will throw off the crank/cam sensing and cause this code to pop up.

Thanks Kevin, not sure on the hours but yes we have replaced the plugs, and inspected the little plug boots from the coil to the plugs.

Could be a spark plug or a coil misfiring at times causing the issue,how many hours are on the truck,have the plugs ever been changed? I would start with them first.