I'm definitely interested in this problem myself. My truck 2001 2500 4wd auto 3:55's. 230k. 275/65/20's thats about a 33 inch tall tire. The previous owner said he replaced the Vp and the stock lift pump. When I had it off to replace the side cover gasket, it appeared to be a remanufactured one. Starts fine, and runs fine. just ordered an airdog 150. seems to be getting around 14- 15 mpg. Another question I have what should these trucks be getting mileage wise. I haven't been hot rodding mine either.

can cheap injectors lead to the lousy mileage club that I am also a member of? I have a rebuilt vp44 from pensacola diesel, and a set of +50 hp candles from the same vendor. I know when I changed them, she would at least start on the first crank, but could that be my problem? even with the smarty, I have only gotten 13.5 mpg at best.

I am also wondering about injectors being the culprit. Seems to have an extended cranking time after sitting cold for a while. I have absolutely no idea as to what injectors are in it having only had the truck for a couple months and am also a little leary on trying to pull them just for the simple fact I have never pulled injectors on a diesel before. Is this a simple process? Where can I get these pop tested? Also based on the mods in my sig what would you guys suggest for replacement injectors? Thanks guys!!!

We have always got great mileage feedback from our Big Dawg Injectors.

Luke

Any suggestion on which hp injectors? 150hp?

Depends on your mods and how you use your truck.

Luke

My truck is mostly used as a daily driver, but would like to be able to pull a fair size camp trailer or boat without worrying about egts going through the roof.

I would say that 100 hp injectors should be plenty big for that i would think and depending on what your future plans are with the truck but i know that scheid diesel has 100 and 150 hp injectors

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Also I'm not sure if you have a programmer but your mileage may change a little maybe not that noticable but if u do have a programmer and change your tire size and it may go up a half mpg or thats what it did on my truck when i changed my tire size to 33 instead of factory

I wouldn't go any larger than 100hp.

Luke

And I guess if you wanted smaller I think bousch makes a 50 hp injector but I think that 100 hp would be good