I may of spoke too soon. Today while stopped at a stop light, all of a sudden the truck started to run extremely rough. So much so that I actually got scared that something was going to break.
This lasted for 20 seconds ( I couldn't pull over as stuck in traffic ) then seemed to correct itself on own. The outside temperature was a nice 24C, all my gauges were normal and the truck was warmed up. I was on the 87 Performance tune when this happened. This is the same thing that happened before. Never done this when on "Stock (0)" setting.
help