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Need help please!
I have a 1994 F-Superduty Flatbed tow truck that I use on a daily basis. It has 161k miles on it and a 5spd manual with pto.
This last Saturday I ran it hard for about 11hrs. I went 550 miles. Towards the end of the day I noticed it puffing blue/white smoke out the exhaust at idle. There was no real timing of the puffs coming out, although it seemed like every 2-3 seconds it would blow a little puff out. It has never done this before. I have not used the truck again until today. Its still blowing the puffs of smoke out even when cold.
When I checked the oil today I noticed very very fine metal flakes in the oil on the dip stick. Once again, I have never noticed these before.
Not sure if this is part of the same problem or a different one but for some time now it has had a strange problem. After decel (usually going down a hill) with your foot off the gas, and just rolling in gear. It will run like crap and kinda stumble for a while with the turbo sounding like its trying to catch up, until it finally smooths out and runs good. It blows smoke during this too. The longer I go without pushing the gas, the more smoke it blows when I get back on the gas. The smoke does not look black, it looks blue/white. It has also seemed to always get real bad gas mileage. Like 8-10mpg.
The exhaust has always smelled really rich. Different then other diesels do.
I ended up taking out today for about 2 hrs and it seemed to run fine except for the above mentioned things.
Any ideas? Where should I start checking?
Thanks in advance