Bedlam wrote:
The derated versions in Navistar and even the Ford vans and chassis cabs had less issues. This is why the ones with the pickup tune should not be run with an aftermarket tuner unless you also plan to upgrade a significant amount of the engine to support even more output.
My 6.0 pulled everything I threw at it even when traveling in the Rockies, so I never considered aftermarket hop-up parts. It does like to rev compared to an inline, but it had no problem breaking the rear tires loose when it used to tow my toy hauler.
I don't know if the van versions were much better; we have a 2006 E-450 cube van at work with 65,000 kms on it (just over 40k miles) that has had over $14,000 in engine repairs done to it; some of it on warranty but most of it off warranty and to the City's expense. This includes EGR and oil cooler, several EGR valves, HPOP and associated high pressure oil system fittings, injectors, FICM, turbo, and a handful of other things I can't remember. It still has an intermittent no start problem that Ford can't diagnose. The City is actually considering sending it to auction early just to be rid of the down time and expenses.
This one is definitely a POS.