North Maine
Merchant Mariner
To be honest I don't think that is too big of a deal... this is an IDI motor, and with all the 6.5's we have running around up here they all look like that starting up on a cold day. With 4 plugs the truck WILL NOT START at 19, so *maybe* you have one bad plug, but I think its more just like the truck is cold. I've felt my old truck run on 3 or 4 cylinders with my foot on the pedal to keep it going till the other cylinders fire.