Get More from your Truck - MPG

[AH64ID]

The last 4 guys that i did injectors on their pickups actually keep track of thier mileage and they all were 5-6 mpg off of overhead. After the install they are within .5-1mpg off now. I talked to erick at brown's diesel and he said that is what he looks for too and he told me the reason was for the extra fuel that is getting by each time it fires/closes. That my personal experience

 

Must not be CR trucks, as the return flow is not factored in the overhead mpg computation.

 

There are other reasons why worn injectors  may effect the OH, but return flow is not one of them.

 

There also aren't any 5.9 CR's that only run .5-1mpg of error, or the owner is lying to you (Or they get about 5mpg). The calibration table is the same from 03-07, regardless of 03-04 or 04.5-07 injectors... let that sink in, and it helps realize why there is so much error. 

[dorkweed]

From the source...........................https://cumminsengines.com/uploads/docs/cummins_secrets_of_better_fuel_economy.pdf

[mopartechnician]

Injectors

[dorkweed]

Injectors

 

 

From what I've read......................it's been 50/50 on that at best...................because of the added "oomff"; they use it.......and the potential of better mileage is negated!!

[Tomassend]

Yep, read into that too.

 

You know if your injectors are leaking if you taked the tack up to 3 k (when engine is warm) and watch it come back down. If it doesn't come back smooth and hangs at all.....you got leakers.

 

Otherwise for the injector change, if you keep it in the exrta 40 hp range you don't seem to cross the threshold of more fuel efficient and too much power/fuel consumption.