After sitting all night when I first start the truck, the first few seconds that it runs, it idles like a V8 with an after market cam. This only lasts about 2 seconds. Also, there is a puff of white smoke out of the exhaust. It has done this the past 3 days. Help me out guys, what can this be? There is no power programmers on this truck nor has there for sometime.

 

when it's cold (like 30 degrees and colder) and I'm not plugged in, and don't wait for the heater grids to come on, I get the same thing if i don't run Power Service in my fuel. I guess it's because the temp in the cylinder is so cold it doesn't fire right off, it has to build some cylinder heat first.
If I wait for the grid heaters to cyle on then I don't have it as bad. If I plug it in or if it's warmer, I don't notice it at all if I have Power Service in my fuel.

 

Over the past 3 or 4 days. the temp. has been 45 - 65 degrees here in Houston and I have been letting the grid heater cycle. It always clears out and runs fine. What could be causing this?