I have a 2000 Dodge Cummins three-quarter ton long box has an air dog fuel system brand new RV 275 Bosch injectors new cold air intake valve lash recently set all new fuel filters cleaned map sensor  missing muffler and tailpipe from exhaust running 265 7516 No matter if I’m pulling a load or completely empty I average between 10 and 12 miles per gallon  90% highway miles  .  I have not had it into the shop 

Hi All,

         I bought take offs LT26575R16 to test before purchasing Traction tires.  I run in CA on the Freeways mostly at 70 MHP and the Tach is spot on at 1900 RPM.  So it's not Tire size or RPM our tach's could be that far off.

 

Michael

I have been tracking mileage even pulling heavy loads it’s 11 mpg

Stupid Question but does the truck make good power?  Put you back in the seat if you open it up rolling?  If not there is an issue.  I was amazed at the H.P. These beasts have when I first got one.  Just saying.

 

Michael

 

I did a little checking and the OD gear in the auto is .69 vs my 6 speed is .73. That would make a difference also. At first  @Jesniccad had said he saw 1700 at 70. That screams bigger tires. The 1900 not so.

 Yeah I felt like it was 1700 but it isn’t i don’t get thrown back in the seat though when I drive it 

Air, Fuel, Compression, and Transmission.  That's where you start.  Get the ODB Link LX that Mike was saying I have one.  Great tool. I bluetooth it to  a small pad.  That way I can read it while driving.  Old Eyes.

 

Looking at your Photo what dash lights are lit?  Not OD Off?

 

Michael

Edited April 6, 20196 yr by int3man

 That’s just ABS and brake light haven’t had those in 12 years happy I don’t 

As for the ABS light that is typically the front speed sensors. Replace both as a set. Being your speedometer is working in the photo I'm going to suggest the front sensors. I just happen to have 2 sets of sensors on hand (used very low miles). If that doesn't fix it the tone ring is damaged in the unit bearings and will need to have both bearings replaced.

 

As for the MPG's you need to report the engine load numbers at 55, 65, and 75 MPH. I want to see how much fuel your commanding.

 

As for my own setup just checked my MPG's for this last tank and got 20.84 MPG. Finally pushed the cost per mile down in the 13's cents per mile. Over 4 cents cheaper a mile than my 1996 Dodge 1500 V8 5.9L.

 

2 hours ago, Jesniccad said:

 Yeah I felt like it was 1700 but it isn’t i don’t get thrown back in the seat though when I drive it 

I cant say mine threw me back in the seat new and stock. 

how do you report the engine load numbers

You'll need the live data tool like an OBDLink LX or similar. Then you can watch the data with your mobile device. Like Quadzilla tuner has engine load as a value.

What setup is best for budget and performance 

Quadzilla Adrenaline is the tuner you should look into. As for injectors I've already done the 7 x 0.0085 (+75HP) which where good I'm currently running 7 x 0.010 (+150 HP) which has even better power. The Quadzilla is very capable of cleaning up. Here is a package deal DAP sells.

 

https://www.dieselautopower.com/dap-vp-truck-performance-bundle

On a different subject my  auxiliary portion on my key does nothing I have no power where would I start diagnostics  

47 minutes ago, Jesniccad said:

On a different subject my  auxiliary portion on my key does nothing I have no power where would I start diagnostics  

 

Got you covered... Check fuses off that ACC contact.



Thanks