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Author Topic: Changing tire size programming  (Read 7116 times)

Offline Crunchy

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Re: Changing tire size programming
« Reply #15 on: March 07, 2018, 01:58:35 PM »
The truck has 9500 on it. I will look into some kind of fuel additive. Fuel filter has another 22% before the comp says they are needing to be changed.

Offline Alchase

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Re: Changing tire size programming
« Reply #16 on: March 07, 2018, 02:52:51 PM »
The truck has 9500 on it. I will look into some kind of fuel additive. Fuel filter has another 22% before the comp says they are needing to be changed.

Crunchy, what vehicle and motor?

Only 9500 miles, and you saw a noticeable MPG decrease?

Shouldn't it be under warranty? I would have them check it out.
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Offline Crunchy

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Re: Changing tire size programming
« Reply #17 on: March 07, 2018, 02:58:31 PM »
Ram 2500 with the cummings.  if I had to guess it would be a combo of the tire size, cold weather with more warm up time idling, and little more city driving than usual.

Offline Alchase

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Re: Changing tire size programming
« Reply #18 on: March 07, 2018, 03:08:26 PM »
Nothing dramatic on size, I went from a 295/65/20 to a 285/70/20

Yea, that's not much of a change at all. Only works out to about 10 revolutions per mile less. Hardly enough to make any noticeable difference.  Could be your truck is more sensitive than some or, like someone else mentioned, maybe the shift in fuel blend.

For a Ram 2500 with the Cummings, I would bet the tire change was insignificant to the issue.
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Offline Crunchy

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Re: Changing tire size programming
« Reply #19 on: March 07, 2018, 03:16:57 PM »
Fuel filters are cheap. Lots of crappy fuel out there. I keep an extra stock spare in the truck.

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I change my fuel filter every other oil change, and coach told me to add fuel additive with every tank. 

which additive did he recommend?

Offline Special T

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Re: Changing tire size programming
« Reply #20 on: March 07, 2018, 03:19:34 PM »
I went up 8% in tire size and saw  a decrease in Hwy milage...
I would bet that that 22% sat is based off mileage, just like the oil change stuff is. OR  idling your your Cummins to warm it up is having an effect on your Emmisions garbage.
 The fuel filter on my dodge is less than $25. Any noticeable difference in mileage pays to put in a new one.

All that computer calculated output is just bells and whistles. Unless there is some kind of fuel drag/resistance sensors I'm 99% certain it's based on mileage, just like how check engine light tend to come on during service intervals. 2c

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Offline jackelope

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Re: Changing tire size programming
« Reply #21 on: March 07, 2018, 03:39:53 PM »
The truck has 9500 on it. I will look into some kind of fuel additive. Fuel filter has another 22% before the comp says they are needing to be changed.

Crunchy, what vehicle and motor?

Only 9500 miles, and you saw a noticeable MPG decrease?

Shouldn't it be under warranty? I would have them check it out.

He put bigger tires on it and it's winter.
There's nothing wrong with the truck.
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Offline jackelope

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Re: Changing tire size programming
« Reply #22 on: March 07, 2018, 03:42:19 PM »
Fuel filters are cheap. Lots of crappy fuel out there. I keep an extra stock spare in the truck.

Sent from my SAMSUNG-SM-G930A using Tapatalk
I change my fuel filter every other oil change, and coach told me to add fuel additive with every tank. 

which additive did he recommend?

Maybe a quality cetane booster?
:fire.:

" In today's instant gratification society, more and more pressure revolves around success and the measurement of one's prowess as a hunter by inches on a score chart or field photos produced on social media. Don't fall into the trap. Hunting is-and always will be- about the hunt, the adventure, the views, and time spent with close friends and family. " Ryan Hatfield

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Offline Woodchuck

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Re: Changing tire size programming
« Reply #23 on: March 07, 2018, 03:55:09 PM »
I run white bottle Power Service in my truck, every tank. fuel filter once a year.
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Offline jackelope

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Re: Changing tire size programming
« Reply #24 on: March 07, 2018, 03:57:42 PM »
I went up 8% in tire size and saw  a decrease in Hwy milage...
I would bet that that 22% sat is based off mileage, just like the oil change stuff is. OR  idling your your Cummins to warm it up is having an effect on your Emmisions garbage.
 The fuel filter on my dodge is less than $25. Any noticeable difference in mileage pays to put in a new one.

All that computer calculated output is just bells and whistles. Unless there is some kind of fuel drag/resistance sensors I'm 99% certain it's based on mileage, just like how check engine light tend to come on during service intervals. 2c

Sent from my SAMSUNG-SM-G930A using Tapatalk



That fuel filter % is based off of a combo of miles, engine hours and engine work load.

Same way as our oil change intervals work now.
:fire.:

" In today's instant gratification society, more and more pressure revolves around success and the measurement of one's prowess as a hunter by inches on a score chart or field photos produced on social media. Don't fall into the trap. Hunting is-and always will be- about the hunt, the adventure, the views, and time spent with close friends and family. " Ryan Hatfield

My posts, opinions and statements do not represent those of this forum

Offline trophyhunt

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Re: Changing tire size programming
« Reply #25 on: March 07, 2018, 04:38:34 PM »
With my truck going from stock to a 6” lift with 35”x 12.50x20”, do you guys feel it’s pretty important to buy a programmer ??
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Offline jackelope

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Re: Changing tire size programming
« Reply #26 on: March 07, 2018, 04:40:28 PM »
Your speedo is definitely not accurate.  I would assume you're losing some performance because of it too. Shift points will be off, etc.

:fire.:

" In today's instant gratification society, more and more pressure revolves around success and the measurement of one's prowess as a hunter by inches on a score chart or field photos produced on social media. Don't fall into the trap. Hunting is-and always will be- about the hunt, the adventure, the views, and time spent with close friends and family. " Ryan Hatfield

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Offline trophyhunt

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Re: Changing tire size programming
« Reply #27 on: March 07, 2018, 04:53:37 PM »
Your speedo is definitely not accurate.  I would assume you're losing some performance because of it too. Shift points will be off, etc.
yes, Speedo is off, it still shifts nice but I’m positive it could be better. My diesel mileage sucks, about 11.5 per gallon pulling a loaded trailer or not.
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Offline Crunchy

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Re: Changing tire size programming
« Reply #28 on: March 07, 2018, 04:57:57 PM »
Your speedo is definitely not accurate.  I would assume you're losing some performance because of it too. Shift points will be off, etc.



Dealership job, or other options?  When I first got the truck I was averaging about 16, after it broke in I was getting nearly 20.  Now it has shot down to about 16 again.  Other than tires, and an oil change nothing has changed.

Offline horsehunter509

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Re: Changing tire size programming
« Reply #29 on: March 07, 2018, 06:17:14 PM »
The truck has 9500 on it. I will look into some kind of fuel additive. Fuel filter has another 22% before the comp says they are needing to be changed.

I never run mine to 0%. Normaly do fuel filter between 20-25%. Not worth pushing it any further for me.

 


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