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24 Valve 2nd Gen Dodge Cummins 98.5-02 Discussion of 24 Valve 5.9 Liter Dodge Cummins Diesels with VP44 Injection Pumps

I was curious as to what type of MPG I should be getting. I drive 65 miles/day with about 5 of that city, the rest on open road. Cruise set at 60-65. Auto with 3.55's 4x4 and only get about 15 mpg. Is this normal? ... JOIN NOW TO REMOVE TRACER

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  #1  
Old 09-16-2009, 09:46 AM
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I was curious as to what type of MPG I should be getting. I drive 65 miles/day with about 5 of that city, the rest on open road. Cruise set at 60-65. Auto with 3.55's 4x4 and only get about 15 mpg. Is this normal? How can I get better? My tire size is 285 75 16. The truck only has around 235,000 miles on it. Thanks.

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  #2  
Old 09-16-2009, 10:17 AM
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Should be a good margin higher than that. What is the condition of your TC? What about your pumps? Better fuel delivery results in better economy in these trucks so without a gauge you'll be hard pressed to see that.

If you are running cruise and 100 k/hr like you are I'd think that you should be around what equals 21+ US MPG.

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  #3  
Old 09-16-2009, 11:51 AM
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I get better than that with all my mods done. You should be able to pull 18 easy.

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Old 09-16-2009, 11:53 AM
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what kind of mods do you have you should be getting better my friends get 18 with 44 inch tires

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  #5  
Old 09-16-2009, 12:26 PM
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Completely stock. Haven't checked my pump, gonna get a gauge as soon as money allows and overall, seems in real good shape. Could the pump be an issue? Would a better air filter help? What about a better exhaust? Thanks.
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Old 09-16-2009, 12:36 PM
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Mine gets 16.5mpg hand calculated.

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  #7  
Old 09-16-2009, 12:46 PM
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Originally Posted by 0331grunt View Post
Completely stock. Haven't checked my pump, gonna get a gauge as soon as money allows and overall, seems in real good shape. Could the pump be an issue? Would a better air filter help? What about a better exhaust? Thanks.
It could be. Poor fuel economy can result from a poorly functioning VP44 injection. It is more likely in your case that the TC is bummed though as this tranny is commonly referred to as the slush box. Get a BD valve body and TC or some other sort of combo and watch the mileage climb.
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Old 09-16-2009, 06:15 PM
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Hey you should be getting at least 18 i get 22 all stock ssept hypertecmax energy and k&n air intake i have a few other little things that wouldnt matter
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Old 09-16-2009, 06:38 PM
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check your fuel filter too
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Old 09-16-2009, 06:40 PM
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235,000 mi. Maybe a valve adjustment might be in order too along with the things mentioned previously

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  #11  
Old 09-16-2009, 07:44 PM
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Mine gets 19 mpg hand calculated.4.10s 305/70/16s thats the 01.02 gets 22.5 mpg hand calculated 3.55s ,285s ,compounds turbos ,250 hp injectors losts of goodies.I noticed a big different in just a TC and a Valve body in the 01.

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  #12  
Old 09-17-2009, 07:31 AM
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Originally Posted by Jet A Fuel View Post
check your fuel filter too
Replaced fuel filter 2 weeks ago with oil change and other fluids. I'm not complainin' about the fuel mileage, but was just expecting more. Its still better than my wife's Tahoe!! When I can, I will look into the VB and TC for tranny and def check on pump/injector asap. Hope to be taking muffler off this weekend as well as silencer ring (just because I can ) If there are any other ideas/thoughts/comments I would appreciate them.

---AutoMerged DoublePost---

Originally Posted by Jazz View Post
235,000 mi. Maybe a valve adjustment might be in order too along with the things mentioned previously
Will look into this, too. Thanks.

Last edited by 0331grunt; 09-17-2009 at 07:31 AM.. Reason: Automerged Doublepost
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  #13  
Old 09-17-2009, 10:22 AM
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throw some 2 stroke oil in to help lube everything injectors could be a little full of crap
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Old 09-17-2009, 08:06 PM
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Check the voltage on your APPS, and Clean both your MAP and IAT sensors.
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  #15  
Old 09-18-2009, 06:57 AM
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Originally Posted by 01quadcab View Post
throw some 2 stroke oil in to help lube everything injectors could be a little full of crap
How much should I put in?

Originally Posted by lukesdiesel View Post
Check the voltage on your APPS, and Clean both your MAP and IAT sensors.
I will work on that this weekend. What should the voltage be?
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