Join Date: Sep 2007
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The dealer in Trinidad, Co. told me that the #8 injector had what he called "continuation", or something like that.
Since the truck was there overnight and was obviously cold the next morning, that he ran the diagnostics again. His feeling was that if any injector was having a problem, it would show up then.
After reading lots of other posts, I decided to try unplugging the ebp sensor. This stopped the computer from trying to make backpressure, which stopped the hissing sound from the tailpipe. It did seem to affect the engine a little, in that it seemed like the engine would hesitate just a little. I've since plugged the sensor back in, and the hissing is back.
The truck still seems to have a problem now and then just driving around without the trailer. I've seen no point so far in hooking up the trailer and dragging it up and down the highway just now. Being the holiday weekend, even if the truck started showing symptoms, there's nobody available at the dealer to have a look. Maybe next week.
Since my original post, I've been noticing a slight diesel smell from the exhaust. This smell is something more than the standard exhaust smell. While it's still not smoking at all, it kinda smells like there's unburnt fuel in the exhaust.