O'Neill

ok sorry if this is in the wrong fourm but im curious what MPG i should be getting

95 ctd
auto
4x4
k&n
straight exhust
410 gears
and no fuel plate
72k miles


i am only seeing around 14 on the highway unloaded even when i had the plate in does this seem off???

what would you recomend to get up around the 19 - 20 range im on the highway a lot mostly unloaded

at 230 a gallon here in indiana i need to do something

thanks

Chris

infidel

The 410 gears are killing you, about the best you can expect on the hiway is 17-20. Might want to kill the cat, check timing and valves. Taller tires will also help.

FANZDSLPWR

my 96 gets 20 mpg with 4.10 rear straight 4 inch exhaust no kat and a k&n air filter and i floor the truck from door to door.

7mmrum

I get about 17-20mpg, I'm close to your mileage at 50k on mine, mine is stock, 4.10 auto

O'Neill

hmm i have the cat out and i have a k and n mabye i need a valve job? i plan to go to 33x12.5 this summer to get some more meat on there to slow it down if i could get 19 id poop myself


thanks for the replies keep them comming

chris

dalee

I KNOW THE 1 TONS GET A LITTLE WORSE, MY 98 12V 3.54 AUTO GETS 10.5 T0 12 PULLING 22K AND 16-18 NO LOAD I HAVE NOT TOUCH TIMING YET

O'Neill

i am going to put my fuel plate back in tommrow night to see if that makes a difference i modded it some i want power, no smoke, and good ecconomy........ yea i know im prolly dreamin but i need some ecconomy here.....poor college student hard up

thanks guys

Chris

j-fox

Something is wrong. Does it clatter like other 12 valve Cummins? Could be a timing issue.
Even with the 4.10 gears I think it could get into the low 20's witha correct tune.
find a Cummins mechanic.

O'Neill

yes the only cummins mechanic close is VAN HASILEY im sure you have heard of him

trick is a couple month wait to get your truck touched.....he is the best tho i dont deny that

Flyer

My 95 2500 has a utility box and except for K&N is stock with 3.54s and I'm getting 20mpg at 65-70mph. Any mods I do will be to increase mpg. Good thing about a diesel is that my torque & hp will go up also.

Lil Dog

Just adding a fuel plate usually doesn't affect mileage greatly unless its alot of city driving (accelleration-stop etc) or you are towing. When you are cruising on the highway the governor should be in the same position whether you have a plate or not, except on hills etc. My mileage was not affected at all with the plate install, but the cat removal helped out. But it was like a 1/2 a point...

The Pre-load on the AFC will affect some of the low boost cruise mileage as well as some adjustment to the Starwheel.. other than that is how efficient you are burning the fuel which would be affected by timing, air in , exhaust out and injector condition. Some fuel conditioner might help out a bit, but not 5 points.

Just some ramblings..

FWIW I get around 19 with my truck and my father-in-law has a 95 4X4 regular cab Auto with 3.54. He gets darn near 21-22.

J-eh

Hemi Cat

My 95 4x4 D3500 gets 17.5 to 18. so far. I have a new motor with only 4000 miles on it. I bumped up the timing, the star wheel, checked the cat and it must have failed cause it's hollow now, inflated the tires to max psi. I drive mostly 70 to 75 open hwy thru the mountain hills out here. I don't know what it will give on the flat ground. I am watching for more tips to improve the fuel economy without busting the bank.