'95 6.5 L Turbo

My engine seems to be losing power. Sometimes I have lots of blue smoke out of the exhaust. Is my fuel pump going bad? Any ideas or experience with this would be helpful. I just changed my fuel filter 4 months ago and it was clean.

How many miles, is your coolant level going down, etc. A little help. Usually the injector pump doesn't make it smoke blue. Oh, and are you sure that the exhaust is blue, or is it white like coolant burning off?

It has about 100,000 miles on it. The coolant stays up, the smoke is really blue at times when I push in the accelerator and try to gain power, like when pulling a load. My mpg is still up to about 16 or so, but Im concerned about the loss of power.

sounds like your are burnin some oil. Those injectors might have o-rings on each one, and is possible the oil is getting through one of those o-rings, i know powerstrokes have those o-rings. Otherwise sounds like valve guides or rings. Do a compression check on each cylender and let us know.

And if you haven't had your pump rebuilt at 100,xxx, then it is probably time. That probably will handle the power problem. But the blue smoke is probably a seperate thing. At 100,xxx and normal oil changes it should just be broke in. Sorry I'm not more help. I agree that if it is excessive smoke then it points to rings or valve guide seals.

dirty or worn injectors can cause the blue smoke blues as well, and to have gotten 100k out of a 6.5 diesel injector pump, man, chevy should have to give you some kind of award for that. I distinctly remember the number 14, related to the revisions on that particular pump, and it still didn't work. Part of the problem was the optical sensor. if the fuel was anything less than optimum, that sensor would fritz out.

good luck with the issue at hand, let us know what happens.

Thanks everyone, Ill let you all know whats going on. Ill start with a compresion check and go from least expensive to more expensive from there!