Hey guys, posting for a friend who has a 06 with around twenty thousand miles. Has a welding rig on it so taking it into the shop for a week or so is not an option, must weld to live... . Problem is: High speed miss, anything above 1800 cuts out, on downhill run, start to lay back into throttle and miss with white smoke. I am thinking fuel pump, but how many pumps are on this booger? Maybe fuel regulator? Anybody else having these problems? This is an HO 325 horse. .