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-   -   Fuel Mileage went in the crapper (https://www.dieselbombers.com/24-valve-2nd-gen-dodge-cummins-98-5-02/19999-fuel-mileage-went-crapper.html)

Jazz 12-24-2008 07:33 AM

Fuel Mileage went in the crapper
 
Wow my last tank of fuel sure was bad, barely made 10 mpg. Cold temps, blended fuel, extended warm up times really takes a toll on fuel mileage. These trucks can't possibly burn much fuel just sitting and warming up even with high idle and 3 cyl. warm up can they:humm: Maybe time for a new fuel filter too. I have to try something

Red_Rattler 12-24-2008 08:57 AM

Man do I hear you on that! Last tank at a half of a tank I was at 225 miles! ended up gettin about 411 miles on that one..... :argh: But the truck don't run now anyways so whatever.....

Uncle Bubba 12-24-2008 09:29 AM

If your like me I got the rude awakening that even though the pump price didn't drop any to reflect the fact, all of the local stations have switched over to B20. A 20% blend and it kills mileage. They make the announcement with a little 2 inch square tag stuck to the pump.

Mopar1973Man 12-24-2008 09:55 AM


Originally Posted by Jazz (Post 258075)
Wow my last tank of fuel sure was bad, barely made 10 mpg. Cold temps, blended fuel, extended warm up times really takes a toll on fuel mileage. These trucks can't possibly burn much fuel just sitting and warming up even with high idle and 3 cyl. warm up can they:humm: Maybe time for a new fuel filter too. I have to try something

You'd be surprised on the flow rates...

3-5 GPH for 3 cylinder warm up...
1-3 GPH for high idle...

This varies for exhaust brake usage too...:w2:

I'm right at 14-15 MPG as well... So it not much better here...

Jazz 12-24-2008 10:14 AM


Originally Posted by Mopar1973Man (Post 258129)
You'd be surprised on the flow rates...

3-5 GPH for 3 cylinder warm up...
1-3 GPH for high idle...

This varies for exhaust brake usage too...:w2:

I'm right at 14-15 MPG as well... So it not much better here...

More than I would have thought:humm: Thanks for the info.:U: Good to know

tyrel_44 12-24-2008 10:23 AM

3 cylinder warm up? How do you get one to idle on 3 cylinders?

01quadcab 12-24-2008 10:28 AM

I am also down on mileage but been in 4wheel for last couple weeks. 12-15 depending on how much snow

Mopar1973Man 12-24-2008 10:34 AM


Originally Posted by tyrel_44 (Post 258146)
3 cylinder warm up? How do you get one to idle on 3 cylinders?


Here ya go... Got to your local dealer or barrow a Smarty...
Dodge TSB

Then the high idle bomb... Then you can build my switch setup and have 3 cyl or high idle any time...
High Idle

http://mopar.mopar1973man.com/tips/c.../high-idle.jpg

Benjamin 12-24-2008 10:41 AM


Originally Posted by tyrel_44 (Post 258146)
3 cylinder warm up? How do you get one to idle on 3 cylinders?

it is a 24v 98.5-2002 thing. us 12v guys don't have that option

Mopar1973Man 12-24-2008 10:50 AM


Originally Posted by Benjamin (Post 258154)
it is a 24v 98.5-2002 thing. us 12v guys don't have that option

Electronics are a beautiful thing...:yeah: I got to admit the 12V is easy to make power with but the electronic 24V's tend making foolers and such easy with a few basic electronic parts and switches...

MOUNTAIN MAN 12-25-2008 09:08 PM

Glad I'm not the only one with crappy MPG's (12-13)
My excuse is the rebuilt engine.

kazairl 12-26-2008 08:55 AM

Mileage for me has been pretty sorry too. About 13-14 MPG. and That is showing some restraint! I would hate to see how bad it is if I were to hot rod it every where... oh wait... I have no restraint. Damnit!

Mopar1973Man 12-26-2008 09:46 AM


Originally Posted by kazairl (Post 258882)
Mileage for me has been pretty sorry too. About 13-14 MPG. and That is showing some restraint! I would hate to see how bad it is if I were to hot rod it every where... oh wait... I have no restraint. Damnit!

Ok... Try hotroding around in this...

http://i143.photobucket.com/albums/r...r/DSCF2532.jpg

http://i143.photobucket.com/albums/r...r/DSCF2523.jpg

I'm lucky if I drive 40 MPH on this stuff t be safe... My ScanGauge II is slumpped down to 15.4 MPG...:bat:

Oh Yeah... "Look Ma' No Chains and No 4WD!" :tttt:

01quadcab 12-26-2008 12:12 PM

that looks like what I have been driving around in for last couple weeks. finally a break in the storms.

dukeboy_318 12-26-2008 01:33 PM

wow, im still getting upwards of 18mpg hand calcuated even on blended fuel and having to run 4x4 and drive 50 or less in ice and snow

Mopar1973Man 12-26-2008 02:48 PM

I got to head in to town today... I'm going to grab my lil' video camera and take it with me...:w2:

ADDON:

Here is a few pics and a chunk of video from my trip to Riggins, ID I passed through Pollock, ID... Then I grab a few evening pics in the dim light...


ScanGauge II data

IA (Intake Air Temp)
Gfr (Gallons of Fuel Remaining)
Tmg (Total Miles Per Gallon)
Dte (Distane To Empty)
http://i143.photobucket.com/albums/r...r/DSCF3123.jpg

My Killer fog lamps...
http://i143.photobucket.com/albums/r...r/DSCF3124.jpg

Love those backup lights...
http://i143.photobucket.com/albums/r...r/DSCF3125.jpg


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