2004 CTD bad MPG
#2691804
08/27/19 03:37 AM
08/27/19 03:37 AM
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Joined: Jan 2003
Posts: 12,798
East Bay, N. Cal.
calmopar
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OP
I Live Here
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East Bay, N. Cal.
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I just bought a chipper/shredder from a guy. He was driving a pretty nice and well-used 2004 Ram 2500 (edit:fixed) with the CTD. He was saying that the MPG had dropped down to 17 or so and he could not figure out why. Is there any well-known leading suspect?
Last edited by calmopar; 08/27/19 10:15 AM.
Trying to enjoy life!
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Re: 2004 CTD bad MPG
[Re: calmopar]
#2691873
08/27/19 10:08 AM
08/27/19 10:08 AM
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Joined: Feb 2003
Posts: 16,133
Mesa, Arizona
dart4forte
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I Live Here
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Mesa, Arizona
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Are you sure it’s a CTD? They didn’t put a diesel in a 1500
“So if it’s on the internet it must be true”
Abe Lincoln
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Re: 2004 CTD bad MPG
[Re: dart4forte]
#2691991
08/27/19 04:16 PM
08/27/19 04:16 PM
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Joined: Feb 2003
Posts: 16,133
Mesa, Arizona
dart4forte
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I Live Here
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Mesa, Arizona
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Any codes showing, possible lift pump problem. Brakes hanging up. My 01 2500 would get 23-24 mpg on average unless I was towing.
Last edited by dart4forte; 08/27/19 04:17 PM.
“So if it’s on the internet it must be true”
Abe Lincoln
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Re: 2004 CTD bad MPG
[Re: calmopar]
#2691994
08/27/19 04:18 PM
08/27/19 04:18 PM
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Joined: Jan 2003
Posts: 8,667
Buford, GA
I_bleed_MOPAR
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master
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Buford, GA
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In-town or highway? The '06 4x4 I had would run 16-18 city and 22-24 highway empty (depending on my right foot  ). Of course, there were those that said I was dreaming and others that did about the same. Tim
'71 Charger 383/727 '17 Challenger SXT (Wifeys car )
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Re: 2004 CTD bad MPG
[Re: calmopar]
#2692207
08/28/19 09:55 AM
08/28/19 09:55 AM
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Joined: Feb 2003
Posts: 16,133
Mesa, Arizona
dart4forte
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I Live Here
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Mesa, Arizona
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100% CTD. I think maybe it was a 2500. It was 2WD also. Also, the sweet spot when cruising the freeway in the 5.9 is around 2000 rpm. That’s about 70 mph. His 2wd most likely has 3.54s. Over 2000 rpm the mileage starts to drop.
“So if it’s on the internet it must be true”
Abe Lincoln
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Re: 2004 CTD bad MPG
[Re: dart4forte]
#2692210
08/28/19 10:02 AM
08/28/19 10:02 AM
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Joined: Apr 2007
Posts: 2,915
Calgary, Alberta Canada
a12rag
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master
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Calgary, Alberta Canada
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Any codes showing, possible lift pump problem. Brakes hanging up. My 01 2500 would get 23-24 mpg on average unless I was towing. My 02 2500 gets same mileage when empty, 23-24mpg. Mine is 6spd, 2wd . . . uhhh, is fuel filter clogged up ??
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Re: 2004 CTD bad MPG
[Re: dart4forte]
#2693329
09/01/19 01:45 AM
09/01/19 01:45 AM
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Joined: Jan 2008
Posts: 2,363
Cotati, CA
Dave Hall
top fuel
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top fuel
Joined: Jan 2008
Posts: 2,363
Cotati, CA
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His 2wd most likely has 4:10. 3.73 was an option. No 3.54. The sweet spot is keeping it under 10 lbs. of boost.
Last edited by Dave Hall; 09/01/19 01:46 AM.
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Re: 2004 CTD bad MPG
[Re: Dave Hall]
#2693338
09/01/19 07:03 AM
09/01/19 07:03 AM
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Joined: Dec 2009
Posts: 20,626
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,626
in a cattle trailer down by th...
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I would look to see if the oil level is climbing. An indication that an injector is leaking fuel into the crankcase.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: 2004 CTD bad MPG
[Re: Guitar Jones]
#2693419
09/01/19 11:32 AM
09/01/19 11:32 AM
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Joined: Feb 2003
Posts: 16,133
Mesa, Arizona
dart4forte
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I Live Here
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Mesa, Arizona
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He can take the vin and run it at the dealer. That will give him the rear ratio. One thing he could do is start running a cleaner through the fuel. It may be a sticky injector. might take awhile. He could drain the fuel filter can, replace the filter and fill with cleaner. Then run the truck.
“So if it’s on the internet it must be true”
Abe Lincoln
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Re: 2004 CTD bad MPG
[Re: Dave Hall]
#2696575
09/11/19 02:34 PM
09/11/19 02:34 PM
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Joined: Feb 2003
Posts: 16,133
Mesa, Arizona
dart4forte
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 16,133
Mesa, Arizona
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The ratio is printed on a sticker inside the glovebox. The fuel filter should be changed every other oil change. I pour the Lucas injector cleaner stuff through mine. Not 100% of the time. My truck seems to like it. I had an injector go bad and it sounded at times like the rods were coming out of it!  No missing that one. I've seen the videos of them leaking into the valve train area but I never thought my trucks mileage was that bad to check it.  Does this thing have an aftermarket air filter on it? I agree on the fuel filter. I change it spring and fall. I fill the canister with a cleaner. 285k and running great, knock on wood!!
“So if it’s on the internet it must be true”
Abe Lincoln
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Re: 2004 CTD bad MPG
[Re: Dave Hall]
#2696626
09/11/19 05:27 PM
09/11/19 05:27 PM
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Joined: Jan 2003
Posts: 6,840
The Swamp
Sixpak
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The Swamp
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His 2wd most likely has 4:10. 3.73 was an option. No 3.54. The sweet spot is keeping it under 10 lbs. of boost. Dunno about an 02 but I definitely ordered my 01 6 speed 2wd with a 3.54. And my mileage empty at 60 mph is around 23-24 like others...70 MPH 2k rpm, stock tire size, stone stock motor. I'd say the sweet spot on my is around 1700 - 1800 / 60 - 65 mph, any above that and the mileage drops off.
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