I am getting some light blue smoke at on cold startups, seems to get better as the engine warms up-92 7.3 diesel with 225,000 miles. It still has good power, and the mileage hasn't changed. Doesn't really burn oil, in fact it doesn't smell like oil, more like fuel. Doesn't smoke when driving, just seems to be at idle-any suggestions?

 

maybe the timing is off a little??

 

I have a 93 Ford and it smoked a little when i would start it up (cold). After it had warmed up it would stop smoking and wouldnt when i started it up. It ended up being a bad glow plug. what you can do is check the glowplugs for continuity. I had a bad one replaced it and it stopped smoking.