davehertle

I am second owner of 2002 2500 24v 4X4 with long bed. I bought it within an hour of it coming off the truck carrier at a local used truck lot.

First owner sold it after a warrant rebuild on the RE47 after 69,000 and a loud clunk from the slush box.

Truck is still stock, though A-pillar gauges are on their way from Geno's

I had a chance to talk with first owner. He volunteered that the truck got about 16 mpg. That was with the equipment he carried on the job.

My first tank was about 14.5. Given, I have been pushing it. So, I backed off on pushing the go pedal, and early into the 2nd tank, I hit 14 only, with the truck empty, and no other load.

I started the 3rd tank with an addition of Power Services Diesel Kleen, thinking it would be good for the injectors anyway.

My first thought, could the AT rebuild be affecting the mpg? I saw one thread that suggested the bands need to be adjusted sometime after a rebuild. If this is required, would it be under the warranty, or just a good practice gleaned from experience.

My biggest issue here is just getting a normal benchmark for this truck, and working from there. Iam told the truck was just serviced, new air cleaner and fuel filter, but what do I really know??

From your combined experiences, should I be accepting of 14.5 mpg on an empty 2500 4x4 RE47, or do I need to get on track with some other efforts.

About the time that I install the gauges, I will do the fuel flow test into the bucket, bumping the starter, to see just what the Lift Pump is really doing. I will probably pull the fuel and air filter and see for myself what I have.

I appreciate that a good answer to a newbie's question goes a long way to help all of us that read through these posts on a regular basis, planning our next project.

BigBlue

I get 16 in the city with my setup empty. 14.5 isn't quite right. Does it have bigger tires on it (285's, 305's, 315's)? If so, your odometer reading is off by at least 10%. The bigger tires are also gonna hurt the economy just a little bit as well.

davehertle

I have stock 265s, and I should have mentioned a 3.55 rear end.

So, I'll let the Diesel Kleen have a tank rotation on the injectors and see if that helps.

But at first blush, there is at least one thing that is just not quite right.