Can a tune make my truck coast better? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 44 (permalink) Old 01-28-2014, 11:51 AM Thread Starter
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Can a tune make my truck coast better?

I have an 04 F350. Every day on my commute home, there are two spots on the road where I can coast down hill for about 2 miles. To get the whole way, I have to put the truck in neutral. If I leave it in drive I have to give it some throttle along the way.

Considering exhaust braking and other trans adjustments can help with towing and be tuned in, can you do the opposite? Are there any tunes that will allow my truck to coast farther, without putting it into neutral? It's completely stock, as of now...
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post #2 of 44 (permalink) Old 01-28-2014, 07:29 PM
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Re: Can a tune make my truck coast better?

......lol

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post #3 of 44 (permalink) Old 01-28-2014, 07:53 PM
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Re: Can a tune make my truck coast better?

i never noticed usually have it in tow haul so I actually don't have to brake while going down hill
i guess you have a slight grade ?

not a request that ever comes up as far as I have read

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post #4 of 44 (permalink) Old 01-29-2014, 10:03 PM
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Re: Can a tune make my truck coast better?

Very unusual. Do you perform this drive with the Cruise Control on??


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post #5 of 44 (permalink) Old 01-30-2014, 04:30 AM Thread Starter
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Re: Can a tune make my truck coast better?

What's weird about wanting better fuel mileage? It's a big chunk of my commute every single day that I get for free. I come home in the middle of the night on a country highway so there is nobody else on the road, I can coast as slow as I want. Not using the cruise control, I just try to minimize the use of both pedals as much as possible.

I just wish it would coast better in drive...I guess there is a good bit of engine braking going on even with the tow/haul mode off.
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post #6 of 44 (permalink) Old 01-30-2014, 04:39 AM
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Re: Can a tune make my truck coast better?

Quote:
Originally Posted by Number21 View Post
What's weird about wanting better fuel mileage? It's a big chunk of my commute every single day that I get for free. I come home in the middle of the night on a country highway so there is nobody else on the road, I can coast as slow as I want. Not using the cruise control, I just try to minimize the use of both pedals as much as possible.

I just wish it would coast better in drive...I guess there is a good bit of engine braking going on even with the tow/haul mode off.
this is going to sound mean but its not intended that way. You bought a diesel, 3/4 ton maybe even a 1 ton truck. Usually fuel mileage isn't a concern. I understand that you want the most out of everything you have (who doesn't). with that being said, I don't believe a tune could help with your coasting ability. if you knock it up in neutral to get fuel mileage then what you are essentially relying on are the aerodynamics of the truck and the condition of wheel/axle bearings, as well as hoping your calipers aren't sticking enough to cause excess drag on the rotor. that's about it really. I wish there was something that could help you but I just don't see it, maybe one of the vets here could chime in. good luck with your search
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post #7 of 44 (permalink) Old 01-30-2014, 06:17 AM Thread Starter
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Re: Can a tune make my truck coast better?

You do know this forum has a whole section dedicated to fuel economy, right? Maybe I should have posted this there....

I bought a diesel truck because it gets much better mileage than a gas truck and I bought an F350 because it's just about the smallest truck you can buy in the US with a diesel. I would love to have an F150 with a 6 cylinder diesel but they won't let me have that.
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post #8 of 44 (permalink) Old 01-30-2014, 09:01 AM
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Re: Can a tune make my truck coast better?

Ask an SCT custom tuner. I'm sure someone could make a file like that for you.
Something to mention is that it is not good to let your engine run at idle for too long...

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post #9 of 44 (permalink) Old 01-31-2014, 01:28 AM
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Re: Can a tune make my truck coast better?

The only way to get what your after is higher axle gearing . It will coast in gear and not wind down . Like a 3.08 or so gear . But all your towing and around town power and mileage will go out the window .

05 F350 9" 4 link , 37's , 4.56 's php and gearhead tuned
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post #10 of 44 (permalink) Old 01-31-2014, 02:21 AM
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Re: Can a tune make my truck coast better?

My math maybe off but if you average 15mpg and fuel is $4 a gallon for easy math, assuming you can only coast one way down the bill on your trip, that's roughly .52 cents saving. How much committing would you have to do to justify buying the tune if someone could do it.

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- MPD Single
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- Tunes by Eric/RCD

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- Ts Tuner Tuned by Eric
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