Reprograming my v10

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Aug 13, 2004 | 12:47 AM

#16

keith w

Fleet Mechanic

Joined: Apr 2001

Posts: 1,264

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My first fill coming back from NY, I got like 12.7mpg with my CC V10 4x4 w/4.30s. Next tank was up to 13.62 mpg, that was with some driving on backroads and up on the Blue Ridge Parkway. I was ecstatic

That was the best it did on the way back to Florida. First couple of tanks back here with mostly in-town driving were right at 10mpg. First couple with the 3500lb utility trailer hooked up were just shy of 9mpg. The last one fell to a whopping 7.98mpg with the trailer hooked up all but about 60 miles. I don't want to even see what it will get with the trailer on for the whole tank. Based on my observations I have come to this conclusion...the gas mileage is all over the place and I can't do anything about it

I think I'll stop checking it

Last edited by keith w; Aug 13, 2004 at 12:49 AM.

Aug 13, 2004 | 01:25 AM

#17

wmcutter

Senior User

Joined: Jul 2004

Posts: 188

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From: Tehachapi, CA

I've got an 01 F350 DRW Crew 4X 4.30. The little computer on the overhead has said 9.3 MPG forever. I've never checked the old fashioned way but guess I should. How accurate, if at all, are these little computers?

Aug 14, 2004 | 08:59 AM

#18

Fredvon4

Logistics Pro

Joined: Jan 2002

Posts: 3,733

Likes: 38

Some are, some are not a lot depends on your consistancy refueling at same pump, same angle, same amount etc.... I found that on a 6 tank average the over head was very close to my manual math + or - .2 mpg. But my buddy started following my method and his was off .6mpg high. And a PSD "friend " used same method to verify overhead and was 1.2mpg off low. I think it is a good averager for a long trip for comparison purposes, but not accurate enough to paint your TRUE fuel consumption.

Aug 14, 2004 | 10:53 AM

#19

wmcutter

Senior User

Joined: Jul 2004

Posts: 188

Likes: 0

From: Tehachapi, CA

Fred, thanks for the input. I'm going to do the manual math and see where it falls over time.

Aug 15, 2004 | 09:54 PM

#20

ms_michelle

Elder User

Joined: Sep 2002

Posts: 615

Likes: 1

From: Smithville TX.

I have a 99 CC and I get a consistant 15 1/2 on the open highway @ 70 mph with out a load. Pulling my enclosed car trailer or my travel trailer it gets 9 to 10 1/2 @65 mph. I might add that I do have a five speed manual tranny.

Michelle

Aug 17, 2004 | 12:31 PM

#21

shnrbckman

New User

Joined: Sep 2003

Posts: 16

Likes: 0

I have almost 9k on my 2004 kr fx4 cc v10 w/ 3.73. Mostly city driving and I get around 11.7 mpg per computer. On extended trips unloaded 14-16. I am not sure on the accuracy of the computer, but I am adamant about resetting it when I fill up. The mpg has gotten better as I have accumulated miles.

Aug 17, 2004 | 02:57 PM

#22

99F350DUALLYV10

Freshman User

Joined: May 2004

Posts: 25

Likes: 0

From: Corona CA

Well I guess a constant 9-10MPG in my 99, F350, 4x4, Dually, 4.30s with 98,000 miles isn't so bad after all? I recently had the timing advance retarded 3 degrees and it did seem to improve the MPG slightly but I think I was over advanced at 35-36 degrees, now it's down to 32 degrees due to having detonation problems (which still exsist by the way). I have never seem better than 10.5 MPG since I owned it (about 6 months, 10K miles).
Does anyone have experience with the Volant Cold Air intake ? improve my MPG? I recently added a Magnaflow cat back system (no differnce in MPG).

Aug 18, 2004 | 06:25 PM

#23

frederic nelson

Junior User

Joined: May 2003

Posts: 77

Likes: 1

From: Lake Mills Iowa

I have 99 with v10, 4x4, 430 gears, k&n, no muffler, 315x75x16 tires, crewcab . My mileage went up when I got a topper on the truck .. It's up by 2 mpg , went on a 400 mile round trip and averaged 12.9 mpg at 65 to 70 mph .. Before only got 10 or less at 65mph Fred