I believe from what the customers told me that it does it cold or warm......the truck will idle fine....I don't believe it's a loss of spark,when I removed the air filter today and started it right back up it ran GREAT no miss when you stepped on the pedal I put it in tilt bypass and didn't miss any then either...And it was acting up just before I took out the filter.....
and it is just a single OHC thought it was dual but just looked at the PDF for it that I have on my iPad and it is just a single cam