when i turn it on since about 1 week ago it smokes a ton on start up, it clears up when it's got a load on it after a few seconds, but then if i'm in gear and i let off the fuel pedal it smokes again. i ajusted my injection pump timing a while back, which fixed this issue, but it's back again for some reason. fwiw, i was at high altitude last weekend, and this started once i got back to normal elevation. what else could cause the issue? when i start, it's white smoke so that would be a fuel issue, but when i let off the fuel in gear it's a bit more blue (oil). why would this be? once the engine heats up, this is not an issue at all. until last week i only had to use the gp's in the morning, and then it was good all day, now i have to use them even during the day and when it starts up it's got a rough idle. what's the deal?