Ok I made the mistake of adjusting my curb idle too much and then back it out too much so where I am at now is as follows:
- On cold start it idles VERY rough (nearly cutting off several time)
- Once it warms up it actually idles a bit high
- But the truck drives fine once warmed up
I get the feeling that the mixture is a little rich doesn't a significant amount of carbon expelling from the tail pipe indicate this? What indicates a lean mixture?